Modern smartphones and tablets are equipped with such power that computers did not have yesterday. However, if the computing power does not stand still, the situation with the batteries is much worse. In 2017, the phones are bundled with batteries that only offer 1-2 days of battery life in mixed use. And under heavy load, the smartphone may not last until the evening.
External batteries come to the rescue - Power Banks. These are compact devices that are created with a single purpose, to accumulate charge and charge external devices. Our selection on Galagram contains the top 10 best external batteries for your mobile technology that you can buy in 2017.
1 The most capacious battery - Xiaomi Power Bank 2 for 20.000 mAh
Main features
- large capacity at 20.000mAh
- output 5V / 2.4A
- manufacturer Xiaomi
This battery comes in a plastic case and offers enormous capacity about 20,000mAh... High-quality lithium polymer batteries are installed inside, and the output voltage and current are 5V / 2.4A. Even high-voltage devices such as the Apple iPad and even the Mi Book Air and MacBook laptops can be charged with the 20,000 mAh Xiaomi Power Bank 2.
In addition, it supports fast charging in both directions: to receive and to return. The dimensions of this monster are 135.5 × 67.6 × 23.9 mm, and the weight is 330.5 grams. Not very small, but your smartphone with a 3000 mAh battery can be recharged more than 4 times. With such a gadget, you don't have to worry about autonomy at all. The average cost of such a power bank is $ 39.
2 Solar powered power bank for travel
Main features
- solar charging
- built-in LED torch
- magnetic compass
- good capacity 12.000mah
A huge plus of this solution is the ability to charge the external battery itself not only from the mains, but also using solar energy. The solar powered Power Bank will appeal to those who travel a lot, as it is convenient to use on the road and over long distances.
In our rating of the best, the battery is 12,000 mAh, with dimensions of 139 × 75 × 20 mm, weighing 230 grams and with a case protected from moisture. Of course, on its front side there is a solar battery for charging, and on the front side there are three ports: micro USB for charging the power bank itself and two ordinary USB for charging external devices. Estimated price in China - $ 15.
3 Mi Power Bank Pro - external battery with fast charging functions
Main features
- fast charging Qualcomm Quick Charge 3.0
- capacity 10.000 mAh
- charging via USB Type-C port
If charging speed is critical for you and you cannot wait long for all your devices in the house to charge, pay attention to the Mi Power Bank Pro battery. Its nominal capacity is 10.000 mAh, and fast charging technology is responsible for fast charging of your gadgets. Qualcomm Quick Charge 3.0.
This gadget is charged via a USB Type-C cable and has four LED indicators on the case to display the charge status. UMB Mi Power Bank Pro is offered in two colors: graphite black and women's pink. You can get such a battery for about $ 30.
4 Power bank with flashlight and protected case
Main features
- the case is protected from moisture and dust
- two powerful flashlights
- capacity 10.000 mAh
- there is a carabiner for attaching to a backpack
If you love wildlife, but can't imagine your vacation without a smartphone, it's time to get an external battery with a flashlight and additional body protection. This solution has a capacity of 10.000 mAh, several colors to choose from and advanced features like solar battery and built-in double lantern to illuminate the area.
As you may have guessed, the flashlights are powered by the power bank itself. By the way, its body has moisture protection so you don't have to worry if you spill coffee on it or drop it in the lake while fishing. The output voltage is 5V / 2A and the battery weighs 290 grams. You can buy the device on Aliexpress for about $ 15-16.
5 Powerbank with a column for music lovers
Main features
- playing music from microSD card and smartphone
- charging gadgets
- AUX output
A true music lover always has music with him. Especially for audio lovers, Chinese manufacturers have prepared Power Bank with built-in speaker and the ability to play music. The model is called Piple S5 and offers not only playing music from a microSD card, but also charging your gadget.
Among the useful chips on the case of the power bank speaker are: 3.5 mm audio output, a port for charging equipment, AUX output and music control keys. You can even play tunes from your smartphone via Bluetooth 4.0. The issue price is $ 39.
6 Power Bank with Wireless Charging
Main features
- the ability to charge compatible gadgets wirelessly
- output 5V / 1A
- thickness 1.9 cm
- capacity 10.000 mAh
This type of external battery can charge not only smartphones and tablets via a traditional cable, but is also equipped with the technology QI wireless charging... It can be used to charge small gadgets such as smartwatches, fitness bracelets and more.
The capacity of this battery is 10.000mAh, the current and voltage is 5V / 1A, and the dimensions are 135 × 75 × 19mm. There are several colors of this model on sale, including white, gray and black. The average cost is $ 39, you still need to pay extra for wireless charging.
7 External battery with PISEN screen
Main features
- capacity 20.000 mAh
- presence of LED display
- 5V and 1 / 2A output
Another power bank in our ranking of the best is the model Pisen with built-in display for indication and display of various indicators. The advantage of this solution is that you know exactly how much capacity your universal mobile battery has left.
This particular model has a nominal capacity of 20,000 mAh (18,600 mAh), a plastic case, a monochrome display itself and two ports for charging smartphones and tablets. The output voltage is 5V and the current is 1-2A, depending on the port. The Pisen power bank weighs 475 grams and costs about $ 32-35.
An external battery is a portable charger with which you can recharge your smartphone, tablet or any other gadget. It does not matter where you are, whether there is access to the mains nearby - an external battery will allow you to always stay in touch. Our article will help you choose the right model and understand the intricacies of this choice.
External battery types
To recharge mobile devices that do not require a powerful power source, compact portable batteries are used to recharge the gadget in a bag or pocket. Such devices are small in size and weight. Laptops consume more power, so a different type of battery is used to recharge it - with increased capacity and special connectors.
Capacity
The most important characteristic of all external batteries is their capacity. Batteries with a capacity of 3000 - 16,000 mAh are suitable for mobile devices (smartphones, tablets, players). To charge laptops, a capacity of 18,000 mAh or more is required. In general, it is recommended to select a battery with a capacity that is at least twice as large as the battery capacity of the mobile device. In order to estimate the approximate number of additional charges that an external battery can provide, you need to divide its capacity by the battery capacity of the device being charged.
Surely everyone at least once faced a problem that all mobile gadgets "suffer" from. This is a dead battery. For some, such a nuisance is not so terrible due to the proximity of the outlet, but for someone it overtakes regularly and seriously.
The way to solve this, sometimes extremely urgent, problem is quite simple - to get an external battery. The main thing is to recharge it in a timely manner, and when going on business, do not forget at home. In order to find the battery you really need, you need to really assess your needs and choose a device with the optimal capacity and other technical indicators.
In order to roughly navigate in all the variety that is presented on the mobile market, let's try to identify the most sensible external batteries (rating of manufacturers and models). The opinions of experts in this field and the reviews of ordinary owners of these devices will be taken into account.
- HIPER MP10000.
- Inter-Step PB240004U.
- TOP-MINI.
- Mi Power Bank 16000.
- GP GL301.
- Gmini mPower Pro Series MPB1041.
- Power Bank 10400.
- Goal Zero Guide 10 Plus Solar Kit.
- HP N9F71AA.
- DBK MP-S23000.
HIPER MP10000
The Hyper brand is enviable in popularity among most owners of mobile gadgets, and among all those who are looking for really high-quality external universal batteries (we present you a rating of the best). The HIPER MP10000 makes this list for its excellent capacity, durability and versatility. The integrity of the structure is ensured by the use of aluminum (and quite thick), so the device is not at all afraid of small shocks and falls.
In general, such an indicator as universality, in our case, is a slightly vague characteristic, so here everyone judges for himself and determines the measure of the practicality of the device. External batteries for smartphones and tablets (see the rating of the best ones above) from "Hyper" MP10000 series are small in size, allowing you to carry the battery in your pockets or purse, and the capacity of the device is enough to fully charge these gadgets.
Features of the device
Another indicator of versatility is a chic set of adapters for almost all occasions. The model also has a built-in micro-SD card slot, allowing you to use the device as a card reader, for example, when working with the same tablet. And finally, the flashlight on the body is able to illuminate a small tent in field conditions - very versatile.
The advantages of the model:
- very robust construction of the device;
- good battery capacity;
- includes six adapters for gadgets and peripherals;
- micro SD slot (card reader);
- good dual-design flashlight.
Flaws:
- the flashlight control buttons protrude too much above the plane of the case, clinging to everything.
Estimated price - about 1800 rubles.
Inter-Step PB240004U
The model outputs from 1 to 2.4 Amperes on different ports, and if you activate two of them in parallel, you can get a current of 3.4 A, which is very impressive. The Inter-Step PB240004U device was included in the rating of external batteries also due to the versatility of the interface: single-amp outputs are "sharpened" for different controllers, that is, there should not be any problems that may arise with adaptation from individual gadget manufacturers.
Features of the device
In addition, the model is equipped with a very informative display on liquid crystals, and the remaining energy resource of the device is indicated as a percentage, with a fairly high accuracy. The built-in LED flashlight does not have a good luminous flux, but it will do quite well in the absence of other light sources.
Pros of the device:
- you can charge up to four gadgets at the same time;
- good spread of charging currents;
- informative and accurate readings of residual charge.
- long time of charging the device;
- judging by the readings of the display - a non-linear decrease in charge.
- the device is heavy for everyday wear.
Estimated cost - about 4500 rubles.
TOP-MINI
This is the smallest The rating has been replenished with this model due to its excellent efficiency (efficiency) - more than 90%. The model will provide your phone or even tablet with up to eight hours of operation after a full charge. The device itself charges for about six hours.
If the device is filled with energy to capacity, then it can charge an iPhone of the fifth or sixth series three and a half times and one and a half times Galaxy Tab from Samsung. The model got into the rating of external batteries not only due to the size and efficiency, but also because of the low price. For some 600-700 rubles, you will become the owner of TOP-MINI, which can easily fit in a regular pocket or a small women's handbag.
The advantages of the model:
- low weight coupled with more than compact dimensions;
- stylish appearance (gloss);
- the presence of an intelligent block against short circuit, overload or overheating;
- LED flashlight.
Flaws:
- the dimensions of the device are reflected in the capacity - only 5200 mAh.
Estimated price - about 700 rubles.
Mi Power Bank 16000
The rating of external batteries for tablets includes a rather interesting model from "Xiaomi" in a case from the device is able to recharge gadgets with a high charging current. Individually, each interface outputs a little more than two amperes, and if you connect them in parallel, you can get up to 3.6 A.
The optimal capacity is around 10,000 mAh. The device is capable of charging an iPhone of the sixth series five times, and an iPad almost three times. The device itself is large enough, so it is not suitable for everyday wear, but at a picnic or on a business trip it is an irreplaceable thing.
Pros of the device:
- very large battery capacity;
- good charging current.
- only four interface indicators, by which it is difficult to determine the real remaining charge.
Estimated price - about 2,500 rubles.
GP GL301
In addition, the manufacturer provides a whole year of warranty service for the device, unlike competitors, which give only two weeks of trouble-free charging, and this is very pleasing. The device is equipped with two USB-outputs, and a well-thought-out design allows you not to think about slipping cables, because, as in our case, it is deeply recessed into the case.
There is also a very good backlighting of the interface, coupled with a high-quality LED flashlight - for spending the night in a small tent.
Device advantages:
- good battery power;
- warranty period - one year;
- high-quality assembly (conscientiously);
- relatively low price.
Flaws:
- the soiling of the device (in the black version).
Gmini mPower Pro Series MPB1041
This is the only device among all the above, which has the same power at the input and output. This moment completely eliminates any overload during recharging of gadgets, which significantly increases the service life of the device.
The device is suitable for almost all devices, except for the Lenovo brand. In this case, a special adapter is required, which must be purchased separately.
The device can be called ultralight for this kind of device - less than 250 grams. With its appearance, it resembles a small tablet. The device is charged via a USB port both from a regular network and from a personal computer or laptop. Separately, it should be noted that if your car has such ports, then this device will ideally fit into the general periphery of the car.
Pros of the device:
- stable work without any overload;
- good battery capacity;
- practicality due to its small size;
- fast charging of both external gadgets and your own;
- affordable price.
- USB charging is not the most convenient way.
Estimated price - about 1,500 rubles.
Power Bank 10400
Probably the only drawback of this device is the brand name. Many users of this kind of devices still shy away from the "Chinese", for reasons known to all. In the case of this model, it is clearly in vain.
The device has an enviable battery capacity, has a relatively small size, convenient, reliable and, importantly, inexpensive. You will fully appreciate the charm of owning this device if you find yourself in places where you need to drive a car for several hours to the nearest outlet.
We should also mention fakes. The same Chinese shadow industry manages to counterfeit its own products, so be wary if you see the price tag for a model below 1,700 rubles.
Device advantages:
- enviable 10400 mAh battery capacity;
- unpretentious and fairly reliable model;
- compact dimensions;
- relatively fast charging (own and gadgets);
- low cost of the device.
Flaws:
- only one USB port for one gadget.
Estimated cost - about 1900 rubles.
Summarizing
If you have several mobile gadgets at your disposal (tablet, smartphone, laptop, etc.), then it is better to choose external batteries of a universal type, which, by the way, are the overwhelming majority on the market.
The principle of operation of such devices is quite simple - the larger the capacity of the device, the more gadgets it can charge. In general, if your mobile device works in comfortable conditions, somewhere in a cozy pocket or on a table in the room, and you do not plan to take it out into the wild, then it simply does not make sense to take external batteries with a capacity higher than 10,000 mAh, because you yourself they will charge much longer than simpler models.
The choice is so great that it's easy to get confused. Appearance, dimensions - characteristics that are obvious and understandable to an ordinary user, but not defining.
Before studying the models of external batteries offered in stores, you should independently figure out from which indicators their rating is formed. This will help to avoid an unsuccessful purchase, a waste of money and a discharged smartphone at the wrong time.
What is it and what is it "eaten" with
Powerbank represents a system of power supplies connected to the controller board. The batteries are hidden under a protective case. The portable device is recharged through a universal port (usually USB). Powerbank is suitable for a wide variety of portable devices. The main condition is the availability of a suitable connector.
Powerbank, depending on the model, allows you to charge:
- smartphones;
- laptops;
- tablets;
- players;
- e-books .
Criterias of choice
How to choose the right power bank? You should focus on several characteristics at once.
The main indicators on which it is most often built rating:
- battery type;
- capacity;
- amperage;
- dimensions and weight;
- functional features ;
- manufacturer (highly subjective factor) .
Battery Type
Power banks are made on the basis of two types of batteries: lithium-ion and lithium-polymer. Li-ion batteries resemble finger-type batteries. The cheapness speaks in favor of the purchase, but they are relatively short-lived. Life expectancy is determined by the total number of charge / discharge cycles. For lithium-ion batteries, the figure is approximately 1000. The disadvantages include a rapid loss of energy, a tendency to rather strong heating.
Lithium polymer portable batteries were developed later than Li-ion. Due to their plasticity, they can be given almost any shape. Relative reliability is characteristic: manufacturers have increased the total operating time to 5000 cycles. Energy is lost relatively slowly. The set of characteristics considered is reflected in the price - Li-pol batteries are several times more expensive than ion batteries.
Capacity
How to choose a portable battery? Another factor to consider is capacity. It is measured in mAh and allows you to judge how many times and which portable devices a certain powerbank model will be able to charge. It is better to choose the battery according to your needs. Overpaying for "powerful" indicators does not make sense: not every gadget needs a battery with a high capacity.
When choosing external batteries, it is recommended to use the following principle: the mAh of the gadget is multiplied by 2-2.5. The result is calculated for a couple of charge cycles. Example: if a smartphone has a 2600 mAh battery, then the indicators that are best guided by when buying a portable battery start at 5200 mAh.
If the purchased portable charger has a capacity less than the battery of the gadget, do not be surprised that.
Recharging tablets requires a lot of energy. A power bank with a capacity of 10,000 mAh or more is recommended for such devices. must have a capacity indicator of 20,000 mAh or higher. Batteries with these characteristics are relatively heavy (on average, 300-400 grams). On the Internet you can find a "beast" with a capacity of as much as 30,000 mAh, equipped with adapters for a laptop. It makes sense to take such powerful devices on long journeys, where there is no outlet at hand. Minus: the considered battery clearly cannot be classified as a pocket battery (its weight is, on average, 800 g).
Some manufacturers indicate the wrong power bank capacity. Often, little-known companies from China were noticed in this, actively promoting goods on Aliexpress. A miniature ultralight power bank, such as a 30,000 mAh battery, should raise suspicions. In order not to be fooled in the store, it is desirable (purchased separately).
It should be understood that a 10,000 mAh powerbank, for example, is not capable of 100% charging a device with a similar battery rating. This does not mean that the manufacturer is unscrupulous. The voltage of the external batteries is 3.7 V, while the powerbank outputs 5 V. The necessary figures are obtained thanks to the conversion processes inside the charger. They lead to a loss of up to 20-30% of energy from the numbers declared by the manufacturer.
Current strength
The indicator is measured in amperes (A). Allows you to judge at what speed the gadget will be charged. Choose a power bank, be sure to pay attention to the instructions for your smartphone. Buying a battery that is too “weak” will cause the device to charge extremely slowly, and sometimes “sit down” at a faster rate than the energy is restored. For this reason, it is better not to include batteries with amperage less than 1 A in the rating.
Gadgets have a number of limitations. For example, 2 A can cause damage to a device, the battery of which is not designed for such an indicator. A good and relatively safe option for a smartphone is a 1-1.5 A power bank. A current of 2-4 A is suitable for charging tablets and similar devices.
Some gadget manufacturers supply products with special controllers. They help to avoid damage if a device with a lower amperage was connected to a battery with a higher rate (due to the conversion to the required number of amperes).
Charging method
The energy recovery method of the powerbank itself is an important indicator. How to choose the right fast charging device?
The manufacturers offered options:
- USB port... One of the most popular ways is to connect to a stationary computer or laptop.
- From the network... Battery energy reserves are restored much faster than in the first case.
- Dynamo machine... Power bank models have been created that give out a charge when the built-in knob is turned. It can not be considered as the main source of energy, but they are able to help out in emergency situations. For example, when you need to make a short important call.
- Solar panels ... Power bank manufacturers are positioning this method as the best option for travelers to keep the battery working in nature.
The effectiveness of the fourth charging method remains questionable. The area of the photovoltaic cells located on the power bank is too small to provide it with the required energy level in a short period of time. In order not to be left on a hike without a working gadget, it is better to purchase special hiking, easily folding solar panels. The size of some of them, by comparison, is 70 by 25 cm.
Additional functional features
More focused on personal preferences, user needs and not particularly impacting on performance.
What powerbank can supply:
- Residual charge indicator ... Helps to navigate how long the external battery will last without recharging.
- Multiple outputs ... For some people, one port is enough, while for others it is important to connect multiple devices at the same time.
- Availability of multiple adapters ... It is especially relevant among owners of devices with "unpopular", technically outdated connectors.
- "Bonuses" not directly related to the phone battery ... Power bank models with flashlights, cable hooks and even a built-in music speaker find their buyers.
Popular models
An overview of the types of power banks in demand will concern manufacturers who have earned a good reputation. The lists of "top" devices, of which quite a lot have been created, cannot be considered completely objective. The best models, ultimately, are different for everyone and are determined by personal needs.
The body is made of plastic. No wonder it is included in the rating: the model is equipped with a 20,000 mAh battery. At the output, the device gives out 2.4 A. Suitable not only for a smartphone, but also for a tablet.
The batteries are reliably protected by a metal casing. The Powerbank is equipped with a convenient LED indicator. A capacity of 10,050 mAh and a current of 2.4 A (output) are sufficient for an iphone.
A manufacturer trusted by users. Power bank 10,000 mAh with a current of 1.5 A. LED indicator is installed.
A device with a compact plastic case. A protective case is included in the package. Positive feature: simultaneous charging of two devices is provided. Capacity 10,040 mAh. Maximum current strength 1 and 2 A (output). There is a built-in flashlight.
Which power bank should you choose? It is up to users to decide. Focus on the rating, someone's video review is recommended, but not necessary. The best option is to carefully study the characteristics of the power bank you are interested in and compare them with your own requests.
In most cases, people who are going to buy a power bank are faced with the same questions: Which power bank to choose? What should you pay attention to?
I will try to give some tips on how to choose a power bank based on your needs and what to look for.
The first thing to think about is do you really need a power bank? First, imagine situations when you might really need an extra charge of your smartphone or other gadgets that can be charged from USB, and how often you find yourself in such situations in your daily life. And only if you really need it, start choosing the model that suits you.
So, what to look for when choosing a power bank:
- Compatibility.
- Manufacturer
- Capacity
- Functionality
- Weight and size
- Design
Compatibility.
Be sure to pay attention that the input voltage required to charge your devices matches the output voltage of the selected power bank model. You can view it either on the mains charger that came with your device, or in the instructions attached to it. For most modern gadgets such as smartphones, tablets, action cameras, GPS navigators, etc. the most common voltage will be DC 5V (5V DC) according to USB specifications.
Current requirements are usually less stringent. So, if you connect a device with a current requirement less than what the power bank can provide, nothing terrible will happen, the charge controller simply will not allow the charging current to be exceeded. If, on the contrary, you connect a device that requires more current to a power bank or charger, in the output parameters of which the maximum current is stated below the required one, for example, a tablet that consumes a current of 2A during charging to the output of 1A, then either the charging process will simply take longer , or the device will not charge at all due to lack of power. However, this usually only happens with very specific devices like the iPad. Manufacturer
When choosing a manufacturer, first of all, you need to keep in mind that Power Bank is a high-tech device, which consists not only of lithium-ion batteries, but also has certain protective systems in order not to destroy your gadget, not to burn yourself and delight you with long-term and trouble-free operation.That is why Power Bank is often called not just a battery, but an "autonomous charger".
Often, buyers make the same mistake - they buy chargers from unknown manufacturers who don't even label their products with logos, tempted by a low price. 
Unfortunately, in such cases, the actual capacity will most often be several times less than the declared one.
So, the first thing you need to do is choose reputable manufacturers. But there is also a downside: the more popular a particular model, the more likely it will be forged. 
Capacity
Next, you need to determine the required capacity of the bank. Think, how many charge cycles of your device should a power bank provide? And multiply this figure by the battery capacity of your device and by a factor of 1.5. Do not believe those tables where the power bank is simply divided by the battery capacity of a smartphone. A 10000mAh power bank will never be able to charge a smartphone with a 3100mAh battery three times. In the best case it will be two and a half times, and in most cases it will be two or a little more than two times.
After all, the voltage of the batteries of the power bank, in most cases, is equal to 3.7V (or close to it), and depending on the current level of battery charge, it can differ up or down. And therefore, it must first be raised to 5V, in order to comply with the USB standard, by a special circuit. Then it will flow through the cable to your smartphone, after which the charge controller in the smartphone will again reduce it to that required for direct battery charging. And at each of these stages there will be greater or lesser losses.
Functionality.
Powerbanks
may also differ in functionality. Here is a small list of convenient, but in my opinion, optional functions: - Second USB port. It is convenient if you need to charge two devices at the same time.
- LED flashlight, which can be useful to you, for example, to make it easier to find the charging socket of your smartphone or tablet in the dark.
- digital battery level indicator
, because by it you can more accurately estimate the exact percentage of the charge level of the power bank than by blinking LEDs. Weight and size
The size and weight of a power bank are proportional to its capacity. The larger the capacity of the batteries in the bank, the greater its weight and size. Also, the type of batteries installed in it affects the weight and size of the power bank, a lithium-ion battery (li-ion) will be slightly larger and slightly heavier than a lithium-polymer battery (li-po) battery of the same capacity.Also, the weight will be affected by the material from which the power bank case is made: the aluminum case of the power bank will be heavier than the plastic one.
You should also take into account the compliance of the declared capacity and weight of the bank. This often makes it easy to identify most power banks with clearly inflated "Chinese optimism»Capacity, because a power bank with a capacity of about 10000mAh will weigh 200-260g. And twice the capacity (20,000mAh), respectively, is about twice as heavy. So if a capacity is indicated that clearly does not correspond to the weight, you should not buy such a power bank.
However, the weight does not yet guarantee that there are no batteries inside with a capacity less than indicated in the characteristics, but at least it makes it easy to identify a clear discrepancy in the characteristics.
Design
The design of the power bank can also play an important role in the choice, because the characteristics are important for someone, but for someone “ he is red!"© therefore, power banks are produced not only in various colors and shades, but also in various forms, up to characters in anime films, for example, a power bank in the form of an anime movie character" My neighbor Totoro» ( My Neighbor Totoro).
Different 
people have different needs, including in power banks: someone needs a small power bank, which they carry with them " just in case", For example as mocreo lavo 2500mAh, thin, lightweight, easy to fit in a wallet, and which will easily help out in a situation " I won't get home soon, the phone goes down, and I'm waiting for an important call"And which will easily replenish the charge of your smartphone to a level sufficient for 
In order not to miss an important call. Well, for someone, you need to repeatedly charge your gadgets far from the outlet, for example, on a hike, charge a GPS navigator, walkie-talkies, etc., and here you will need more capacious models, such as Teclast T200E at 20000mAh, or even several.
