Information about the make, model, and alternative names of a particular device, if any.
Design
Information about the dimensions and weight of the device, presented in different units of measurement. Used materials, suggested colors, certificates.
| Width Width information refers to the horizontal side of the device in its standard orientation during use. | 69.5 mm (millimeters) 6.95 cm (centimeters) 0.23 ft 2.74in |
| Height Height information refers to the vertical side of the device in its standard orientation during use. | 125 mm (millimeters) 12.5 cm (centimeters) 0.41ft 4.92in |
| Thickness Information about the thickness of the device in different units measurements. | 14.95 mm (millimeters) 1.5 cm (centimeters) 0.05 ft 0.59in |
| The weight Information about the weight of the device in different units of measurement. | 170 g (grams) 0.37 lbs 6oz |
| Volume Approximate volume of the device, calculated from dimensions provided by the manufacturer. Refers to devices with the shape of a rectangular parallelepiped. | 129.88 cm³ (cubic centimeters) 7.89 in³ (cubic inches) |
| Colors Information about the colors in which this device is offered for sale. | Black |
| Housing materials The materials used to make the body of the device. | Aluminium alloy |
| Certification Information about the standards to which this device is certified. | IP67 MIL-STD-810G |
SIM card
The SIM card is used in mobile devices to store data that certifies the authenticity of mobile service subscribers.
Mobile networks
A mobile network is a radio system that allows multiple mobile devices to communicate with each other.
Mobile technologies and data rates
Communication between devices in mobile networks is carried out through technologies that provide different data rates.
Operating system
The operating system is the system software that manages and coordinates the operation of the hardware components in the device.
SoC (System on a Chip)
System on a chip (SoC) includes all the most important hardware components of a mobile device in one chip.
| SoC (System on a Chip) A system on a chip (SoC) integrates various hardware components such as a processor, graphics processor, memory, peripherals, interfaces, etc., as well as the software necessary for their operation. | MediaTek MT6582M |
| Technological process Information about technological process on which the chip is made. The value in nanometers measures half the distance between the elements in the processor. | 28 nm (nanometers) |
| Processor (CPU) The main function of the processor (CPU) of a mobile device is the interpretation and execution of instructions contained in software applications. | ARM Cortex-A7 |
| Processor bit depth The bit depth (bits) of a processor is determined by the size (in bits) of registers, address buses, and data buses. 64-bit processors have higher performance than 32-bit processors, which, in turn, are more productive than 16-bit processors. | 32 bit |
| Instruction Set Architecture Instructions are commands by which the software sets/controls the operation of the processor. Information about the instruction set (ISA) that the processor can execute. | ARMv7 |
| First level cache (L1) Cache memory is used by the processor to reduce access time to more frequently accessed data and instructions. L1 (level 1) cache is small and much faster than both system memory and other cache levels. If the processor does not find the requested data in L1, it continues to look for them in the L2 cache. With some processors, this search is performed simultaneously in L1 and L2. | 32 kB + 32 kB (kilobytes) |
| Second level cache (L2) L2 (level 2) cache is slower than L1, but in return it has a larger capacity, allowing more data to be cached. It, like L1, is much faster than system memory (RAM). If the processor does not find the requested data in L2, it continues to look for it in the L3 cache (if available) or RAM. | 512 kB (kilobytes) 0.5 MB (megabytes) |
| Number of processor cores The processor core executes program instructions. There are processors with one, two or more cores. Having more cores increases performance by allowing multiple instructions to be executed in parallel. | 4 |
| Processor clock speed The clock speed of a processor describes its speed in terms of cycles per second. It is measured in megahertz (MHz) or gigahertz (GHz). | 1300 MHz (megahertz) |
| Graphics Processing Unit (GPU) Graphics Processing Unit (GPU) handles calculations for various 2D/3D graphic applications. AT mobile devices ah it is used most often by games, consumer interface, video applications, etc. | ARM Mali-400 MP2 |
| Number of GPU cores Like the CPU, the GPU is made up of several working parts called cores. They handle the graphical calculations of different applications. | 2 |
| GPU clock speed Speed is the clock speed of the GPU and is measured in megahertz (MHz) or gigahertz (GHz). | 416 MHz (megahertz) |
| The amount of random access memory (RAM) Random access memory (RAM) is used by the operating system and all installed applications. Data stored in RAM is lost when the device is turned off or restarted. | 1 GB (gigabytes) |
| Number of RAM channels Information about the number of RAM channels that are integrated into the SoC. More channels means higher data rates. | single channel |
| RAM frequency The frequency of RAM determines its speed, more specifically, the speed of reading / writing data. | 533 MHz (megahertz) |
Built-in memory
Each mobile device has a built-in (non-removable) memory with a fixed amount.
Memory cards
Memory cards are used in mobile devices to increase the storage capacity for storing data.
Screen
The screen of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc.
| Type/technology One of the main characteristics of the screen is the technology by which it is made and on which the image quality of information directly depends. | LCD |
| Diagonal For mobile devices, the screen size is expressed in terms of its diagonal length, measured in inches. | 4 in 101.6 mm (millimeters) 10.16 cm (centimeters) |
| Width Approximate Screen Width | 2.06in 52.27 mm (millimeters) 5.23 cm (centimeters) |
| Height Approximate Screen Height | 3.43in 87.12 mm (millimeters) 8.71 cm (centimeters) |
| Aspect Ratio The ratio of the dimensions of the long side of the screen to its short side | 1.667:1 5:3 |
| Permission Screen resolution indicates the number of pixels vertically and horizontally on the screen. Higher resolution means sharper image detail. | 480 x 800 pixels |
| Pixel Density Information about the number of pixels per centimeter or inch of the screen. Higher density allows information to be shown on the screen in clearer detail. | 233 ppi (pixels per inch) 91ppm (pixels per centimeter) |
| Color depth Screen color depth reflects the total number of bits used for the color components in a single pixel. Information about the maximum number of colors the screen can display. | 24 bit 16777216 flowers |
| Screen area Approximate percentage of screen space on the front of the device. | 52.59% (percentage) |
| Other characteristics Information about other functions and features of the screen. | capacitive Multitouch Scratch resistance |
| Corning Gorilla glass |
Sensors
Different sensors perform different quantitative measurements and convert physical indicators into signals that are recognized by the mobile device.
Main camera
The main camera of a mobile device is usually located on the back of the case and is used for taking photos and videos.
| Diaphragm Aperture (f-number) is the size of the aperture opening that controls the amount of light reaching the photosensor. A lower f-number means the aperture is larger. | f/2.4 |
| Flash type The most common types of flashes in mobile devices cameras are LED and xenon flashes. LED flashes give more soft light and unlike the brighter xenon ones, they are also used for video filming. | LED |
| Image resolution One of the main characteristics of mobile device cameras is their resolution, which indicates the number of pixels in the horizontal and vertical direction of an image. | 2560 x 1920 pixels 4.92 MP (megapixels) |
| Video resolution Information about the maximum supported resolution for video recording by the device. | 1920 x 1080 pixels 2.07 MP (megapixels) |
| Video - frame rate/frames per second. Information about the maximum number of frames per second (fps) supported by the device when shooting video at the maximum resolution. Some of the main standard shooting and video playback speeds are 24p, 25p, 30p, 60p. | 30 fps (frames per second) |
| Characteristics Information about other software and hardware features related to the main camera and improving its functionality. | autofocus Burst shooting digital zoom Digital Image Stabilization panoramic shooting HDR shooting Touch focus Face recognition Adjusting the white balance ISO setting Exposure compensation Self-timer |
Additional camera
Additional cameras are usually mounted above the screen of the device and are mainly used for video calls, gesture recognition, etc.
Audio
Information about the type of speakers and audio technologies supported by the device.
Location determination
Information about navigation and location technologies supported by the device.
WiFi
Wi-Fi is a technology that provides wireless communication for short distance data transmission between different devices.
Bluetooth
Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.
USB
USB (Universal Serial Bus) is an industry standard that allows different electronic devices to communicate.
Headphone jack
This is an audio connector, which is also called an audio jack. The most widely used standard in mobile devices is the 3.5mm headphone jack.
Connecting devices
Information about other important connection technologies supported by the device.
Browser
A web browser is a software application for accessing and viewing information on the Internet.
Video file formats/codecs
Mobile devices support various video file formats and codecs, which store and encode/decode digital video data, respectively.
Battery
Mobile device batteries differ in their capacity and technology. They provide the electrical charge they need to function.
| Capacity The capacity of a battery indicates the maximum charge it can store, measured in milliamp-hours. | 2000 mAh (milliamp-hours) |
| Type The type of battery is determined by its structure and, more specifically, by the chemicals used. Exist different types batteries, with lithium-ion and lithium-ion polymer batteries most commonly used in mobile devices. | Li-Ion (Li-Ion) |
| Talk time 2G Talk time in 2G is the period of time during which the battery is completely discharged during a continuous conversation in a 2G network. | 16 h (hours) 960 min (minutes) 0.7 days |
| 2G standby time The 2G standby time is the amount of time it takes for the battery to fully discharge when the device is in stand-by mode and connected to a 2G network. | 624 h (hours) 37440 min (minutes) 26 days |
| 3G talk time Talk time in 3G is the period of time during which the battery is completely discharged during a continuous conversation in a 3G network. | 16 h (hours) 960 min (minutes) 0.7 days |
| 3G standby time The 3G standby time is the amount of time it takes for the battery to fully discharge when the device is in stand-by mode and connected to a 3G network. | 456 h (hours) 27360 min (minutes) 19 days |
| Characteristics Information about some additional features device battery. | Removable |
| Battery model: B10-2 |
Specific Absorption Rate (SAR)
SAR levels refer to the amount of electromagnetic radiation absorbed by the human body while using a mobile device.
| SAR level for head (EU) The SAR level indicates maximum amount electromagnetic radiation that the human body is exposed to when holding a mobile device next to the ear in a conversation position. In Europe, the maximum allowable SAR value for mobile devices is limited to 2 W/kg per 10 grams of human tissue. This standard has been established by CENELEC in accordance with IEC standards following the 1998 ICNIRP guidelines. | 0.51 W/kg (watt per kilogram) |
| Body SAR (EU) The SAR level indicates the maximum amount of electromagnetic radiation that the human body is exposed to when holding a mobile device at hip level. The maximum allowed SAR value for mobile devices in Europe is 2 W/kg per 10 grams of human tissue. This standard has been established by CENELEC following the 1998 ICNIRP guidelines and IEC standards. | 0.554 W/kg (watt per kilogram) |
| Head SAR (US) The SAR level indicates the maximum amount of electromagnetic radiation that the human body is exposed to when holding a mobile device near the ear. The maximum value used in the US is 1.6 W/kg per gram of human tissue. Mobile devices in the US are controlled by the CTIA and the FCC conducts tests and sets their SAR values. | 0.74 W/kg (watt per kilogram) |
| Body SAR (US) The SAR level indicates the maximum amount of electromagnetic radiation that the human body is exposed to when holding a mobile device at hip level. The highest acceptable SAR value in the US is 1.6 W/kg per gram of human tissue. This value is set by the FCC, and the CTIA controls whether mobile devices comply with this standard. | 0.9 W/kg (watt per kilogram) |
Caterpillar is primarily associated with the construction business: excavators, tractors and heavy trucks. Probably, the company decided that for complete set lacks its line of rugged smartphones.
Today's B15Q model. In general, this is an evolution of the previous B15 model. The case remained almost the same, at the request of the smartphone, a flashlight was added. But there are more serious changes inside the device…
Packaging and equipment
The box in which the smartphone is delivered is made in yellow and black.
The interior is divided into several sections with accessories and the device itself. A set of accessories is small: a USB cable for connecting to a computer, Charger and documentation.
Design
The smartphone complies with the IP67 standard, which means protection against dust and immersion in water up to a meter deep for 30 minutes. It is also certified to the military standard 810G - which means protection against drops from a height, vibration and a wide range of operating temperatures. According to the manufacturer, the smartphone can withstand a drop test from a height of 1.8 m without consequences.
The design is quite aggressive, and the case has decent volumes of 69.5 x 125 x 14.95 mm, and this is considering the rather modest display diagonal. Surprisingly, the weight is quite small - 170 grams; apparently, there are no metal parts in the design, or practically none.
Most of the body is made of elastic plastic, and the side parts are made of aluminum. Each side has three bolts. Most of the front panel is covered by a protective glass framed by a wide frame that protrudes slightly above the surface.
In the upper part, in the center, there is a small slot for the earpiece, to the left of it is the CAT logo, to the right are slightly visible light and proximity sensors, as well as the front camera lens.
Under the screen is a row of three touch keys - "Recent applications", "Home" and "Back". Below them on the right is a small microphone opening. The device does not have a notification diode.
All keys of the device - yellow color, for visibility. The power button is located at the top right, in the center under the plug is a 3.5 mm jack.
The volume rocker and the camera/flashlight button are on the right side.
On the reverse side, also covered with a plug, there is a micro-USB connector.
The main camera lens is on the left upper corner, above it is a noise reduction microphone, and to the right of it is a flash diode.
Screen
The screen - IPS-matrix with a diagonal of 4 inches - has a WVGA resolution of 800x480, with a density of 233 ppi. The sensor is capacitive, with multi-touch, supports up to 10 simultaneous touches. The screen is equipped with a light sensor and automatic backlight adjustment. The manufacturer claims to use Gorilla Glass II as protection.
In general, the B15Q is far from the highest quality displays, if you count on standard smartphones. But as for the protected, he, of course, is good. Its capabilities are enough to work in any conditions.
Interface
The smartphone operates on the basis of Android 4.4.2 without any significant changes. Surprisingly, there is no way to restart the smartphone through the power menu.
Device in operation
The device is equipped with a MediaTek MT6582M quad-core processor with a clock speed of 1.3 GHz, RAM - 1 GB and built-in - 4 GB. Less than 2 GB will be available to the user.
Camera
The smartphone is equipped with two cameras: front 0.3 MP and main - 5 MP. The main one has autofocus and LED flash.
The front camera is suitable for video calling, it’s better not to hope for the rest.
The main camera also does not have the capabilities, but it does its job well.
The maximum resolution for video recording is 1280x720.
In general, the camera here is a technical tool.
Wireless interfaces
The device has support for two SIM-cards. Each of them can be configured individually. There is a device and Wi-Fi with support for 802.11n, and Bluetooth 4.0. There are no complaints about anything.
Offline work
The battery of the device is removable, with a capacity of 2,000 mAh. Additional Applications and there are no energy saving functions on the smartphone.
In 720p video playback mode with maximum brightness and medium volume, the smartphone will work for about 5.5 hours.
Results
in front of you typical model"SUV". Manufacturers do not try to install high-quality displays and modern camera modules in such devices. It is obvious that the user of this product is more interested not in fantastic performance, but in simplicity and reliability in operation. Our smartphone can easily splash in the mud, sink into the sand and experience other pleasures of hard work - and still maintain full functionality.
As for the cost, here, apparently, the name of the company makes up a considerable part of it - 14,990 rubles.
Specifications Caterpillar Cat B15Q:
screen: TFT IPS, 4'', 800x480, capacitive, multi-touch;
Processor: Quad-core MediaTek MT6582M, 1.3 GHz;
graphics accelerator: Mali-400 MP2;
operating system: Android 4.4.2;
RAM: 1 GB;
built-in memory: 4 GB;
memory card support: micro SD up to 32 GB;
communication: 2G: GSM 850/900/1800/1900 MHz || 3G: WCDMA 850/900/2100 MHz;
Internet: GPRS/EDGE class 12 || HSPA+ 21 Mbps / HSUPA 5.76 Mbps;
SIM: two standard SIM cards, Dual SIM Dual standby;
wireless interfaces: Wi-Fi 802.11b/g/n (point WiFi access); Bluetooth 4.0;
navigation: GPS, Assisted GPS || GLONASS;
cameras: main - 5 MP, front - 0.3 MP, LED flash;
sensors: light sensor, gyroscope, proximity sensor;
battery: 2000 mAh, removable;
dimensions: 69.5 x 125 x 14.95 mm;
weight: 170 grams.
Video review of the smartphone Caterpillar Cat B15Q
Not so long ago, we considered a Caterpillar push-button secure smartphone. But there are more advanced solutions on the Android platform in the arsenal. Today we are testing the Caterpillar Cat B15Q, a smartphone that has become a continuation of the development of the B15 model. In general, the concept and design of the case remained unchanged, the filling was improved and a flashlight was added.
In particular, the Cat B15Q received an updated quad-core Mediatek processor, doubled the RAM, and installed the operating system Google Android 4.4. But whether everything is so good, we'll see during testing.
Video review Caterpillar Cat B15Q
Availability of Caterpillar Cat B15Q
At the time of testing, the average cost of TurboPad 911, according to the Yandex.Market service, is 4990 rubles.
Equipment
The smartphone comes in a compact package with a traditional Caterpillar design with a combination of yellow and black colors.
The bundle is modest for a rugged smartphone, the buyer receives: a USB cable, a network adapter and documentation stylized as a smartphone.
Appearance
The case design stands out against the background of solutions from competitors. The use of aluminum added its own zest to the appearance of the Caterpillar Cat B15Q smartphone.
A distinctive feature of this solution is compliance with the IP67 standard, it is protected from dust and it is not afraid of immersion in water to a depth of up to a meter for 30 minutes. Just like the previously tested push-button smartphone, it has an 810G military certificate (drop and work in a wide range temperatures). In fact, you should not purposefully test your smartphone for strength, all this protection is more like insurance against accidental water ingress or falling to the ground, this is not a panacea, cases with broken screens in the predecessor, judging by the reviews, take place.
Case dimensions are 69.5 x 125 x 14.95 mm, with a weight of 170 grams. Surprisingly, with its dimensions, it lies very easily in the hand. I would even like it to be heavier, especially if this additional heaviness was due to a capacious battery, which, by the way, this model also does not shine like its predecessor.
The case is made of a combination of rubberized plastic and brushed aluminum inserts. The overall style is complemented by mounting bolts for these plates. The front panel is protected by Gorilla Glass, on the side this glass has a protruding frame. The CAT logo is located in the upper part, next to it is a protected speaker, a camera lens, as well as proximity and light sensors.
The buttons are located as follows: on top is the power button, on the right is the volume rocker and additional button. The latter allows you to activate the flashlight with a long press or double-click to activate the camera application. All buttons are yellow.
There are two connectors, and both are protected by rubber plugs. Top center 3.5 mm jack, left micro USB.
At the top back cover housed the peephole of the main camera with a chrome trim, a noise reduction microphone, a flashlight and a speaker grille.
In the central part there is the CAT logo made of aluminum. The cover is removable, but the fastening mechanism with bolts is replaced with a plastic retainer. For better or worse, it's hard to say, but on initial use, the flexibility of the lid inspires confidence, how it will be further, time will tell.
Under the cover is a removable battery, micro SD slot and two slots for SIM-cards.
There are no complaints about the build quality, everything is done perfectly.
Screen
An IPS-matrix with a diagonal of 4 inches and a resolution of 800x480 pixels is used, the density is 233 ppi. At the screen Caterpillar Cat B15Q good angles view, but there is color distortion when tilted vertically. Color balance shifted to cold tones. The maximum brightness level is at the middle level.
The screen is glare, but the image remains legible.
Filling
The heart of the Caterpillar Cat B15Q was Mediatek processor MT6582M. This quad-core chip is clocked at 1.3 GHz. The Mali-400 MP2 is responsible for the graphics.
On board 1 GB of RAM and 4 GB of storage. There is not enough space for applications, part of the problem can be solved with a memory card. If the software is still more or less clear, then powerful games the user is unlikely to be able to install without complex tricks.
Antutu
3D Antutu
Connection
The smartphone supports two SIM-cards in 3G mode, priorities can be configured independently. There were no problems with signal reception. Wi-Fi 802.11n and Bluetooth 4.0 are also supported.
On start and cold GPS start takes an average of 2 minutes.
Battery
Autonomy is far from the strong point of this smartphone. For such a thick body, the manufacturer offers a 2000 mAh battery. A full charge is enough to watch two movies in maximum resolution. With average use, the charge is enough for the whole working day. Before climbing into the forest with an overnight stay, consider the issue of charging, Powerbank will not be superfluous for the Caterpillar Cat B15Q.
Camera
The miracle did not happen, manufacturers still complete secure smartphones with mediocre cameras. Although, it would seem that this is where photo opportunities can be useful, especially for lovers of extreme recreation. Problems are observed in poor lighting.
The 5 megapixel main camera module can only work adequately in good lighting conditions. The pluses include the ability to start with a mechanical button, it will be useful for shooting in the rain or under water.
Soft
Operating room installed Google system Android 4.4.2 without interference from the manufacturer. Several additional programs are installed, which are mainly stores (you need to buy a gas generator or an excavator, easy).
The interface works smoothly, without lags and freezes.
Results for Caterpillar Cat B15Q
Changes in the Caterpillar Cat B15Q came in place, while the difference in cost is an average of 1000 rubles. The buyer gets an updated SoC, doubled RAM, Android platform 4.4 and a flashlight. But not all the sores of the predecessor have been cured, the smartphone still cannot boast capacious battery, large internal memory and quality camera. During the tests, the smartphone was immersed in water, dirt, all these hardships did not negatively affect its functionality.What did not like
Problem with memory card. (Does not write applications to it by default).
What did you like
Unkillable phone. Long battery life (if you do not climb the Internet). Can be washed.
What did not like
After half a year of operation, he fell on my floor from the height of the sofa and the screen was smashed into the trash. Also, I was told at the service center that there were no spare parts for it, and they even refused to change the screen. Paralyzed after half a year left-hand side screen and began to hang terribly. Also, when falling, the lid often flew off and began to creak very strongly. And the video on it is terribly inconvenient to watch, tk. while watching the video comes with lags, and absolutely all the videos.
What did you like
Large screen, soft touch and, at first, fast software.
What did not like
battery. flashlight
What did you like
interesting design
What did not like
Dumb, too heavy. Frank KETai under a famous brand, I don’t know if the Yankees know about such a product, but if it’s from them, then we should introduce anti-sanctions :). Weak hardware.
What did you like
Questionable build quality, does not meet those protective functions declared by the manufacturer. My work requires such a phone (good idea, but disgusting implementation). He fell a couple of times at a construction site - alive, but they did not press the bulldozers of the company of the same name - the result is obvious.
What did not like
Navigation is bad. Few operatives.
What did you like
Gorgeous rugged design. Waterproof and some shockproof. Soft touch surface.
What did not like
outdated android
What did you like
protected, original
What did not like
flashlight. The charging socket is a bit narrower than standard micro-USB connectors. universal chargers hard to stick.
What did you like
he is unkillable
What did not like
did not notice, flashlight? well, maybe:)
What did you like
Security, design, reliability
What did not like
OOOOchen weak camera. No flashlight/flash. Sometimes Skype is buggy - crashes and does not come in until you reboot the bodies. But I think this is more a question for Skype than for a device.
What did you like
Not heavy for a rugged phone. Quite comfortable in the hand. Tests of water, throws and dust withstood with dignity. Very scratch resistant screen. I've been using it for 3 months very casually. There are no scratches. My previous htc one x for 3 months the screen became almost matte) Normal operation of 2 SIM cards. Doesn't really slow down the OS. Battery keeps like ordinary smart. For the money - a great device!
What did not like
At the time of writing this review, CAT has not entered into an agreement with service centers on the territory of the Russian Federation. So it makes no sense to take ROSTEST, since there is no guarantee! The call sound is quiet. No photo flash and no HDMI.
What did you like
I have been using the phone for 5 days. The device sits nicely in the hand, the battery lasts for a couple of days in medium load mode (mail, calls an hour a day, player). The plugs fit securely, the connection keeps normally. I bought the Estonian version for 10k - it makes no sense to take it more expensive. Installed 15 applications - I do not observe brakes and glitches. In general, I am satisfied with the device, there are no obvious jambs. 2 SIM cards work in parallel.
What did not like
Camera. But she is not needed at a depth - in a puddle)
What did you like
Stylish design. Really solid phone. Moderately brutal and nimble.
"Indestructible" phone for workers and builders
Walking once, already at the end of last year's IFA 2012 exhibition, along the most distant and secluded nooks and crannies of its pavilions, we stumbled upon a small, but very curious stand for us with representatives of mobile technology, which we still do not know. Cute, unusual, brutal-looking thick and ribbed mobile devices, never seen on the Russian market, not only instantly attracted the eye of the sophisticated journalistic public with their amazing “armored” design, but also became participants in the “cruel” show arranged by company representatives right on the spot. Before our eyes, phones that have a strong (which could be understood even by the unusual appearance) protected from dirt and water, thrown directly into construction concrete mixers, kneaded together with fresh concrete, and then, casually rinsing with running water from a garden hose, demonstrated to the stunned spectators the remaining full-fledged performance of the mobile devices that had passed this "hell".
Everything became clear as soon as it became clear who exactly was the initiator of all this "disgrace". The company demonstrating the “cruel” treatment of fragile electronics turned out to be the famous American corporation Caterpillar, a world leader in the production of construction and mining special equipment. Accordingly, the "electronics", to the production of which such a company had a hand, also turned out to be far from fragile. The participants of that memorable show were several completely indestructible mobile phones and even one smartphone, on the body of which the logo of this famous construction corporation flaunted. The smartphone was called the Cat B10, and, of course, at that moment we really wanted it to become the hero of one of our reviews.
However, it took much longer than we would have liked before we managed to get hold of one of these super-rugged smartphones from a well-known heavy equipment manufacturer for testing. By that time, the life cycle of the Cat B10 smartphone was already waning, and a new “changer” came in its place - the owner of no less characteristic external data, a smartphone called Cat B15. Naturally, we chose for our tests a more recent model, which has only recently begun its journey to the market.
Since we always take up reviews with great interest and test all dust and moisture-proof devices that appear on our market, we have already accumulated some experience on this topic. Summarizing most of these studies, we most often come to the same conclusion: almost all of the dust and moisture-proof mobile devices on our market (and the vast majority of them now belong to the Japanese company Sony) cannot be fully called protected devices. None of the Sony ruggedized devices on our market, for example, are protected from shocks and drops, and most of them are not even equipped with locks on removable covers. When such phones fall on a hard surface, the plastic latches of the covers can simply bounce off, and then all the measures provided by the manufacturer to protect against dirt and water from entering the case become meaningless - the cover flies off, the filling is exposed. If such a phone falls, say, into a puddle on hard asphalt, then such a fall can end as badly for it as for any other mobile device that does not have special protection against water. Thus, this species devices can be attributed, according to the classification adopted in the automotive market, not to SUVs, but rather to “SUVs” - pampered “citizens” who demonstrate external paraphernalia more than actually have the capabilities of an “all-terrain vehicle”. Such protected mobile devices can only be carefully brought into fresh water and held there for half an hour at a depth of half a meter - that's all.
Pictured: Cat B15 compared to Sony's waterproof and dustproof smartphones (Xperia acro S, Xperia V and the most recent Xperia ZR), as well as one of Lenovo's rugged smartphones on a similar hardware platform (Ideaphone A660).
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Moreover, we were interested in getting some of the real "off-road vehicles" designed for truly harsh operating conditions for testing. Caterpillar's connection to Ruggedized Mobile makes sense: with nearly a century of experience in some of the toughest, most remote-urban work environments, these people know what true heavy-duty heavy-duty equipment is all about. By the way, the company is also a manufacturer of the famous yellow non-wearing boots, which are so loved by workers and builders all over the world (in the very first photo, the girl cracks down on phones in just such boots). Recently, they have also been offered reliable electronic mobile assistants.
Naturally, we did not expect anything special from the performance of the Cat B15 smartphone. The usual MediaTek platform inside, a small screen resolution, modest hardware data - all this was known even before testing. However, this is not what guides people who buy such secure devices. They are interested, first of all, in protective qualities, and only the hardware stuffing is the tenth thing. However, we, as professionals in our field, are always very much concerned about this part of the issue. Therefore, we still got an overseas smartphone at our disposal and spent everything with it pilot studies that we spend with any other mobile device entering our test lab. Of course, we did not test the protective properties mobile phone, dropping it from the roof of a house or putting it under the wheels of a car - that would be too much. The Cat B15 smartphone in our hands passed exactly the same standard testing according to the methodology we developed as all the other heroes of our reviews. Here is our detailed report on it.
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Main characteristics of Cat B15
| Cat B15 | Sony Xperia ZR | Sony Xperia V | Lenovo A660 | Samsung Galaxy X cover 2 | |
| Screen | 4", TN | 4.55" IPS | 4.3″, VA? | 4", TN | 4" IPS |
| Permission | 800×480, 233 ppi | 1280×720, 322 ppi | 1280×720, 342 ppi | 800×480, 233 ppi | 800×480, 233 ppi |
| SoC | Qualcomm Snapdragon S4 Pro @1.5 GHz (4 cores, ARMv7 Krait) | Qualcomm MSM8960 @1.5GHz (2 cores, ARMv7 Krait) | MediaTek MT6577 @1GHz (2 cores, ARM Cortex-A9) | @1 GHz (2 cores, ARMv7) | |
| GPU | PowerVR SGX 531 | Adreno 320 | Adreno 225 | PowerVR SGX 531 | Mali 400MP |
| RAM | 512 MB | 2 GB | 1 GB | 512 MB | 1 GB |
| Flash memory | 4 GB | 8 GB | 8 GB | 4 GB | 4 GB |
| Memory card support | microSD | microSD | microSD | microSD | microSD |
| Operating system | Google Android 4.1 | Google Android 4.1 | Google Android 4.0 | Google Android 4.0 | Google Android 4.1 |
| Battery | removable, 2000 mAh | removable, 2300 mAh | removable, 1700 mAh | removable, 1500 mAh | removable, 1700 mAh |
| cameras | rear (13 MP), front (0.3 MP) | rear (12 MP), front (0.3 MP) | rear (5 MP), front (0.3 MP) | rear (5 MP), front (0.3 MP) | |
| Dimensions | 125×70×15.0mm, 170g | 131×67×10.4mm, 138g | 129×65×10.7mm, 120g | 125×65×10.5mm, 138g | 131×68×12mm, 149g |
- SoC MediaTek MT6577, 1 GHz, 2 cores, ARM Cortex-A9
- GPU PowerVR SGX 531
- Operating system Android 4.1.2 Jelly Bean
- Touch LCD display TN, 4″, 800×480
- Random access memory (RAM) 512 MB, internal memory 4 GB
- slot for microSD cards up to 32 GB
- GSM communication 850, 900, 1800, 1900 MHz
- Communication 3G UMTS 850, 900, 1900, 2100 MHz
- Bluetooth 2.1+EDR
- Wi-Fi 802.11b/g/n, Wi-Fi hotspot
- GPS, A-GPS
- Camera 5 MP, autofocus
- Camera 0.3 MP (front)
- Dust and moisture protection (IP67)
- Li-ion battery 2000 mAh (B10-2)
- Dimensions 125×69.5×14.95 mm
- Weight 170 g
Contents of delivery
The smartphone goes on sale in an attractive small package in the form of a rectangular box made of thick cardboard with a branded bright yellow color and a few concise inscriptions. It is pleasant to take it in hand: everything is neat, strict, of high quality - everything shows that the product was released by a serious manufacturer.
In the box there was not a very rich set - everything is only the most necessary: a small charger, a connecting cable, a modest wired stereo headset with regular headphones non-insert type, and documentation. It is noteworthy that the instruction manual is made here in the form of a thick booklet with cut corners: in terms of dimensions - a copy of the smartphone itself. A trifle, but nice. I was also pleased with the set of spare parts included in the kit in the form of rubberized caps and even metal screws for attaching them to the case. Everything is thought out to the smallest detail: if the rubber gasket wears out, or the slot of the old screw breaks when dismantling the cover, then they will find a replacement in the kit. Everything shows that the manufacturer was preparing his "SUV" for really the most severe operating conditions.
About security
The Cat B15 is officially certified to IP67 dust and water resistance, which means complete protection against dust ingress, as well as protection against low-pressure water jets from all directions, and can be stored at a depth of 1 meter in fresh water for up to 30 minutes. water.
As mentioned above, the Cat B15 smartphone is a device of a completely different level of protection than most of the dust and moisture-proof smartphones of the “traditional” mobile equipment manufacturers currently on the market. Its significant difference is protection, not only from dust and water, but also from falls: the rubberized body of the hero of today's review has increased impact resistance. As for the official data on this issue, the manufacturer states in the instruction manual that the phone has been tested against drops from a height of 1.8 meters (human height), and guarantees that the smartphone will not be damaged during such a fall. An interesting phrase follows: the company guarantees the protection of the device from accidental bumps and falls, but is not responsible for the consequences of intentionally “cruel” handling of the device. However, this is all, of course, reinsurance: the thick rubberized body of the Cat B15 will certainly be able to withstand falls from much greater heights. The advertising phrase on the branded manufacturer sounds something like this: “Drop it from a height of 1.8 meters upside down on concrete, and it will bounce back, even if smartphone will fall screen down. The display, by the way, is covered with Corning Gorilla protective glass with the ability to control wet fingers (Wet Finger Tracking).
We checked the last possibility, and even tried to take pictures with a smartphone camera under water - everything was confirmed. The smartphone can not only be operated with wet fingers (which is very important in extreme conditions of rain, snowfall, etc.), but also easily withstands immersion in water to a depth of 1 meter for 30 minutes. Photographing under water is, of course, not included in the official list of capabilities of this “SUV”, however, after the declared underwater shooting function of the Sony Xperia ZR, we decided to check this possibility with the Cat B15.
It was not difficult, because the Cat B15 smartphone, like Sony Xperia ZR is equipped with a hardware key to control the camera, which means that it is really capable of shooting underwater, although this is not included in the official circle of its “duties”. Of course, in the absence of a built-in flash, you can’t expect anything artistically outstanding from underwater shooting on the Cat B15 camera - the quality of the photos is rather modest. But the fact remains that due to the presence of a hardware photo button, underwater shooting on the Cat B15 camera is quite possible. Recall that with full immersion, not a single screen will perceive the touch of your fingers, which means that it is impossible to shoot by clicking on the virtual icons on the display - only if there is a hardware camera shutter key.
Appearance and usability
So, the Cat B15 smartphone is equipped with a shock-resistant case that can protect the fragile electronic filling not only from dirt and moisture, but also from falls. This implies the features of the body of this communicator: rough, angular, very thick and quite heavy. The thickness of the case is justified by protection against shocks and falls - thick rubberized plastic surrounds the electronic stuffing with impenetrable protection. It is difficult to say for certain whether there is a metal frame inside this layer of plastic: the manufacturer calls its case “aluminum body”, but this may be just a play on words, or this phrase may only mean aluminum protective pads screwed on the sides of the device. In any case, you feel the real power and impenetrability of these thick walls, which makes you believe in the absolute reliability of the device in terms of impact resistance.
The phone, as already mentioned, is very thick - almost 15 mm, which is a kind of "anti-record". But, of course, it would never occur to anyone to find fault with the excessive thickness of this smartphone - everyone understands that this is dictated by the structural features associated with the ability of the smartphone case to withstand bumps and falls.
There are no glossy and shiny surfaces here - only matte rubberized plastic and rough metal side plates. Due to this, the phone is firmly held in the hand and does not slip. Fingerprints here, in fact, there is nowhere to leave, except on the screen itself - the rest of the case is completely unmarked.
The Cat B15 housing has a removable plastic cover that, unlike most devices from "traditional" mobile equipment manufacturers, has a real lock, which prevents it from being opened by shocks. This compares favorably with the novelty from analogues from Sony, Samsung and others in the sense that plastic latches may not withstand, but the lock will still hold the cover in place when it falls and will not allow the electronic filling and contacts to be exposed. This is an important distinction that allows us to recommend this smartphone rescue workers, extreme athletes, travelers, and just fishermen and hunters, for whom the fail-safety of the surrounding equipment is most relevant, and sometimes vital.
Under the cover, there are slots for SIM-cards and memory cards protected from moisture and dirt, which are supported after installation. battery. Thus, without removing the battery, it is impossible to get to any of the interchangeable cards.
The phone supports two SIM cards (using the Mini-SIM format) and microSD memory cards up to 32 GB. All pyramid-type cards are installed one above the other and do not require frequent changes: they also have to be removed one by one, it is not possible to remove the lower ones separately, and it is very inconvenient to get them out of the slit-like slots. There is really nothing to pry a stuck card with - in which case you will have to use tweezers, and it’s better not to think about using a Micro-SIM with an adapter at all: it will be very difficult to insert and remove it back.
The front panel is almost completely covered with durable protective glass Corning Gorilla, resistant to scratches. The screen is framed by thick half-centimeter frames - some of them are plastic, some are metal. Hidden under the glass are the eyes of the sensors and the front camera, as well as the bottom three buttons for controlling the system and applications. The buttons under the screen are touch-sensitive, have a dim milky backlight, the duration of which can be adjusted regular means it is forbidden. The screen and touch buttons respond quite comfortably to finger touches - there are no problems with this, there were no erroneous clicks, as well as inhibition in response.
All other controls and connectors are traditionally located on the edges of the device. On the top end, the power button is adjacent to the 3.5 mm audio jack, and the camera control button is embedded between the volume keys on the side. The Micro-USB connector is hidden under a cover on the left side, the bottom end was left empty. The main microphone is located on the front edge under touch buttons. All connectors are securely covered with tight rubber plugs, and they are not fixed to the case with traditional flexible "tails", but screwed with real metal screws. These parts are interchangeable and replaceable.
All mechanical buttons have a fairly rough ride. They almost do not protrude from the case, but the response when pressed is quite distinct. The volume is regulated here not by a two-position rocker, as is the case in most cases, but by two separate independent buttons. The camera control key located between them is unable to activate shooting in sleep mode - in any case, you must first unlock the smartphone, which is logical: we have a product thought out to the smallest detail, in which nothing should work by itself or accidentally pressed in your pocket.
And finally, a few minor remarks. Firstly, the metal side plates did not really add beauty to the device - the all-color rubberized Cat B10 case with its black ribbed sides looked somehow more rigorous and finished in terms of design. And there is nothing to say about the convenience of holding in your hand: in wet fingers, metal, of course, glides better than rubber. Secondly, the Micro-USB socket is recessed so deep that not every third-party USB cable will fit. The owner of the device needs to remember this, otherwise you can take another cable on the road, relying on their versatility, and be left without charging all the time. As for the colors, there is no diversity here: we did not find any mention of any other color options for the Cat B15 than the one that was in our test specimen.
Screen
The Cat B15 is equipped with a modest 53 x 82 mm TN touch matrix, 102 mm (4 inches) diagonal, 800 x 480 pixels resolution, and a pixel density of 233 ppi.
The brightness of the display has both manual and automatic adjustment, the latter based on the operation of the light sensor. Multi-touch technology allows you to process up to five touches simultaneously - verified AnTuTu program tester. The screen is quite responsive, there are no problems with this. The smartphone also has a proximity sensor that blocks the screen when you bring the smartphone to your ear.
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Detailed examination using measuring instruments held by the editor of the sections "Monitors" and "Projectors and TV" Alexey Kudryavtsev. Here is his expert opinion on the screen of the test sample.
The screen of the smartphone is covered with a glass plate with a mirror-smooth surface and, judging by the reflection of objects in it, if it has an anti-reflective filter, it is very weak. On the outer surface of the screen, there may be a special oleophobic (grease-repellent) coating, but its effectiveness is very low, as a result, the screen is easily covered with fingerprints, which are relatively difficult to remove.
At manual control brightness, its maximum value was 316 cd / m², the minimum - 13 cd / m². As a result, even at maximum brightness in bright daylight, the visibility of information on the screen will not be very high. There is an automatic brightness control according to the light sensor (apparently, it is located to the left of the front camera). In complete darkness, the auto-brightness function reduces the brightness to 13 cd/m² (too low), in an artificially lit office, the brightness is set to 56 cd/m² (more or less), in a very bright environment, it rises to 88 cd/m² (and you need increase to the maximum). AT automatic mode when external lighting conditions change, the screen brightness rises and falls, but this mode is of little use, since the brightness is set clearly below the required one. The brightness of the backlight has a modulation with a frequency of about 42 kHz, this is very high frequency, so there is no visible flickering on the screen.
AT this screen a TN type matrix is installed. The micrograph demonstrates the subpixel structure typical of TN (or rather, the lack of structure):
The screen has good viewing angles in the horizontal direction, but at the slightest deviation upwards, dark shades are inverted, and when deflected downwards, light shades are inverted. With a perpendicular view, the uniformity of the black field is not high, since the black field is noticeably brightened along the screen border. Contrast is good - about 800:1. The response time for the black-white-black transition is 11 ms (8.6 ms on + 2.4 ms off), the transition between halftones 25% and 75% (by the numerical value of the color) and back takes a total of 24 ms. Short response times are, perhaps, the only positive property of this matrix. The gamma curve constructed from 32 points did not reveal a blockage either in the highlights or in the shadows, and the exponent of the approximating power function turned out to be 2.45, which is higher than the standard value of 2.2, while the real gamma curve is in good agreement with the power dependence:
Color gamut less than sRGB:
Apparently, the matrix filters mix the components to each other, and the spectra confirm this. This technique allows you to increase the brightness of the screen at the same energy costs for backlighting, but the colors lose their saturation.
The balance of shades on the gray scale is disgusting, as Colorful temperature above the standard 6500 K, the deviation from the blackbody spectrum (delta E) is high, and both parameters vary greatly from hue to hue:
It can be concluded that the screen is definitely not strong point this device.
Sound
In terms of sound, the smartphone cannot boast of anything special. Both speakers are not loud enough, especially the external one. Obviously, the general specific internal arrangement, organized in order to protect against moisture ingress, affects. The speaker is additionally covered with a special protective membrane that does not allow water to pass through, so the sound is more deaf and quiet. This effect is found in many waterproof models (the exception, by the way, was the same Lenovo Ideaphone A660 from the comparative plate - although this smartphone is protected, it simply deafens with its loud sound). No particular distortions are observed in the telephone dynamics, the voice of a familiar interlocutor, intonations and timbre are well recognizable, but the voice still sounds muffled, as if from behind an obstacle. The external speaker grill is located at the back, so the sound is also significantly muffled by the surface when the phone is placed on the table (screen up).
The regular audio player is not particularly remarkable, from sound settings there is only a standard equalizer with several preset values.
Camera
Cat B15 is equipped, like most modern smartphones, with two digital camera modules. True, the front camera is equipped with only a very modest VGA module with a resolution of 0.3 megapixels.
main, rear camera it is also equipped with a rather modest 5-megapixel module, from which, nevertheless, the image processing program “squeezes” everything it can. By default, the camera shoots in the maximum possible resolution of 5 megapixels, while the pictures are obtained at a size of 2560 × 1920. Examples of photos taken with factory settings and our comments on their quality are presented below.
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A perfectly acceptable resolution. The foliage of trees in the background starts to stick together, but the camera tries to process it. |
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The same effect on the crowns of trees. In the lower right corner, the resolution drops a little, but in general, the image is very decent, even in the farthest plans. |
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The foliage is worked out well, but it seems that it is painted. |
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The exposure is good. The noise in the shade is very moderate. |
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In the background, the clarity of large objects is decent, and finely detailed ones seem to be drawn. |
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Again, the same effect of sticking together small objects, but good sharpness of large ones. |
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Noises in the shadows are barely noticeable. |
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Small font distinguishable, which, of course, is not so surprising, but good. |
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The macro is nice and detailed, there is even a hint of bokeh. |
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The text is not damaged, but there is a feeling that anti-aliasing has been done to the font. |
The camera is nice and quite reasonable. She works out her 5 megapixels completely.
In many pictures, you can notice too smooth and uniform transitions between shades. The camera very interestingly processes what it sees poorly due to its limited capabilities. The program seems to paint the landscape with oil. Of course, this is a minus from the point of view of documentary shooting, but from the point of view of art, this is a very interesting phenomenon. The program simply paints a picture from nature itself. And it should be noted that she does it well. Quite smoothly transitions from sharp zones to unsharp ones look.
The camera copes well with noise, trying to shoot at minimum ISO values. For example, the yellow box shot uses ISO 103, and is the only shot in this series that does not have ISO 50.
This camera does a good job with both artistic and documentary shooting. Of course, for a documentary, she doesn’t have much high resolution, but software processing sometimes adds "artistic" to the pictures.
The camera can shoot video, and is not even deprived of the opportunity to “try” itself in Full HD shooting, but it succeeds badly: the image is slow and torn, so the system frankly cannot cope with shooting at maximum resolution. By default, the camera only shoots video at a resolution of 640x480. Nevertheless, we tried to shoot in both modes, examples of clips are presented below. The clips are saved in a 3GP container (video - MPEG-4 Visual (Advanced [email protected]), sound - AAC LC, 128 Kbps, 16 kHz, 2 channels).
- Movie #1 (13.4 MB, 640×480)
- Movie #2 (8.65 MB, 640×480)
- Movie #3 (31.2 MB, 1920×1088)
Camera control settings are standard for Android systems: not the most successful layout of icons makes you search through the menu. The choice of options, such as shooting resolution, is carried out by pressing the small arrows to the right and left, which is very inconvenient. In general, manufacturers are doing the right thing by modifying standard interface Google. However, the shooting control options are quite rich: you can add geotagging, artistic effects, and color effects, adjust white balance, saturation, brightness, contrast, and even enable HDR mode.
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Shooting, as already mentioned above, can be done by pressing virtual button on the screen and on the hardware mechanical key on the side of the device. This key is not capable of activating the camera from the lock state, as, for example, with Sony smartphones. But you can take pictures right while shooting a video, which is useful.
Telephone part and communications
The smartphone works standardly in modern 2G GSM and 3G WCDMA networks; support for fourth generation networks (LTE) is not. In general, the network capabilities of a smartphone today are minimal: the 5 GHz Wi-Fi range is not supported, and there is no support for NFC technology either.
There were no freezes or spontaneous reboots / shutdowns during testing. When brought to the ear, the screen is blocked by the proximity sensor. The ambient light sensor controls the brightness level of the screen automatically. But here, unfortunately, no warning light sensor was provided, which is a pity.
OS and software
There is not much to talk about in this section. Used as a system software platform Google Android version 4.1.2 and its proprietary interface. The developer did not use any additional graphical user interfaces of his own production, nor can you find additional pre-installed third-party applications here. Everything remained as it was intended by the creator of the system - only the "bare" Android and a few icon links to the web pages of various online services of Caterpillar itself (for example, rental construction equipment). But of course, nothing prevents the user from downloading and installing any programs available in the Google Play online store.
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Performance
The Cat B15 hardware platform is based on a single-chip system (SoC) MediaTek MT6577. The CPU here has 2 Cortex-A9 cores running at 1GHz. Assistance in graphics processing is provided by video GPU processor PowerVR SGX 531. Random access memory the device has only 512 MB, which is not enough for the Android system. Storage available to the user for download own files, initially is about a gigabyte of the nominally designated 4 GB of internal memory, but it is possible to expand the memory through microSD cards. Connection mode external devices to a USB port (USB Host, USB OTG) is not supported here.
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Based on the results of the data obtained during the testing, the performance of the Cat B15 turned out to be at the expected low level. There is no discovery in this: as a result of the tests, Lenovo A660 gave exactly the same numbers, the work of which is organized on a similar hardware platform. By the way, a secure smartphone Samsung results similar.
As for testing the graphics subsystem in the 3DMark cross-platform test, neither Lenovo A660 nor our today's "ward" frankly coped with it. The phones simply failed to pass the test, throwing out failure messages on the screen. In principle, it is understandable: the test itself is very difficult, and both devices officially do not meet its requirements - at least in terms of the amount of RAM.
AT game test Epic Citadel results for the Cat B15 graphics subsystem are modest, but at least the testing passed without failures.
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As for the benchmarks for evaluating the speed of the javascript engine, the results in them significantly depend on the browser in which they are launched, so the comparison can only be truly accurate on the same OS and browsers, and this is not always possible. In the case of devices running on operating system latest versions Android, we always try to use Google Chrome.
Video playback
To test "omnivorous" when playing video (including support for various codecs, containers and accessibility, such as subtitles), we used the most common formats, which make up the bulk of the content available on the Web. Note that for mobile devices it is important to have support for hardware video decoding at the chip level, since it is possible to process modern versions using only processor cores most often impossible. Also, do not expect everything from a mobile device to decode everything, since the leadership in flexibility belongs to the PC, and no one is going to challenge it.
| Format | container, video, sound | MX Video Player | Regular video player |
| DVDRip | AVI, XviD 720×400 2200 Kbps, MP3+AC3 | plays normally | plays normally |
| Web-DL SD | AVI, XviD 720×400 1400 Kbps, MP3+AC3 | plays normally | plays normally |
| Web-DL HD | MKV, H.264 1280x720 3000Kbps, AC3 | Program | |
| BDRip 720p | MKV, H.264 1280x720 4000Kbps, AC3 | plays fine with decoder Program | Video plays fine, no sound¹ |
| BDRip 1080p | MKV, H.264 1920x1080 8000Kbps, AC3 | playback with delays, sound only with a decoder Program | Video plays fine, no sound¹ |
¹ Audio in MX Video Player only played after switching to software decoding (in Hardware+ the smartphone refused to play MKV); The regular player does not have such a setting.
Battery life
The capacity of the battery installed in the Cat B15 is 2000 mAh. The battery here, as already mentioned, is removable, so that it can be removed and replaced (battery brand B10-2).
Continuous reading in the FBReader program (with a standard, light theme) at the minimum comfortable brightness level (brightness was set to 100 cd / m²) lasted until the battery was completely discharged for 14 hours and 15 minutes, and for continuous viewing of YouTube videos in high quality (HQ) with the same level of brightness over a home Wi-Fi network, the device spent more than 7 hours - not bad indicators, but this is normal for small screen with low resolution and dim backlight. The Lenovo A660 performed worse, consistent with its smaller battery capacity.
Outcome
Officially, Caterpillar does not supply its smartphones to the Russian market, and Cat B15 can be purchased abroad at a price starting from 300 euros. If you search in online stores, then in our country the few sellers that offer this model set a price for it from 21 to 25 thousand rubles. Of course, the smartphone turns out to be very expensive for such primitive characteristics: for such money you can buy two uncertified Sony Xperia V (≈11 thousand rubles) or as many as three Lenovo A660 (≈7 thousand rubles), and in terms of protection against dust and water, these models are are basically equal. But if you are faced with the task of choosing a truly protected smartphone model that is not afraid of falls from a height and hitting rocks, then here, perhaps, you can overpay. However, it is better, of course, to try to order a Cat B15 from abroad, on the same Amazon for example: it will come out much cheaper, even with delivery.
