Before buying a power bank, most users pay attention to the capacity - however, this is far from the only and not always the main parameter.
If you have to charge a laptop or netbook, it is much more important to find out how much current the device provides.
It is advisable to take into account the number of connectors on the external battery, the number of charging ports and even the brand, but for some the price will be the deciding factor - although saving may lead to the purchase of a low-quality and low-performance gadget.
A parameter called “capacity” affects the number of charges for a tablet or smartphone that the power bank will provide.
You should also choose it based on the battery capacity of your gadgets.
For example, if you need to double the operating time (1715 mAh), a 5000 mAh external battery is sufficient; for LeEco Le Pro 3 (4000 mAh) there are models with twice the capacity.
Important: The manufacturer often indicates the maximum capacity of the power bank - the real one turns out to be less by about 30–35%. Therefore, a 20,000 mAh model is not enough for 3 charges of a 6500 mAh battery, but only 2.
The dimensions and weight of the power bank do not matter if it is in the car most of the time. If you need to carry the battery in your pocket or bag, it is advisable that the device be compact and weigh no more than 300–400 g.
These parameters are met by models with a capacity of 10,000 mAh from most manufacturers and some devices with a capacity of 15–20 thousand mAh.
The weight of the device is also affected by the material of its body.
The best option is aluminum - power bank shells made from this metal provide sufficient strength and do not increase the weight too much, although the price of the battery increases.
Plastic models weigh less, but their cost is usually lower.
The number of ports matters when you need to charge several gadgets at the same time.
Most power banks with a capacity of no more than 10,000 mAh are equipped with only one connector; more productive ones have 2, 3 and even 4 ports.
The main port is standard USB 2.0 or 3.0; USB Type-C, which increases charging speed, is less common.
If you need to connect Apple smartphones, you should give preference to those power banks that allow you to connect iPhones without adapters.
The time spent on charging depends on the current strength at the connector output. The usual value for power banks that serve smartphones is 2.0–2.1 amperes.
The resource of the device reaches 500 charge and discharge cycles - using the power bank every day, you can notice a deterioration in the parameters no earlier than after 1.5–2 years.
Victor S.: Small, compact and not heavy. Easily fits into a bag and looks stylish. True, it comes with only one connector, so you can charge only one smartphone at a time. But, if desired,
The requirements for external batteries for regular smartphones are lower than for gadgets designed for laptops and phones with large battery capacities.
The power of such devices, as a rule, is in the range of 5000–10000 mAh, which is enough to charge an average phone 2–3 times.
The differences between power banks in this category are more favorable prices, small size and weight.
A capacity of 10,000 mAh is enough to restore the functionality of 3-4 iPhones, 2-3 models of the same Xiaomi brand and one powerful tablet like Chuwi P10.
Despite all its advantages, the battery is equipped with only one USB port, which is why you can charge only one phone or tablet PC at a time.
Andrey L.: Easy to use and not much different in appearance from other power bank models. True, it charges smartphones twice as fast - almost the same as from the mains through a special charger. I didn’t find any disadvantages, other than the relatively high price (if you need to charge your smartphone no more than once a day, and speed is not very important, you can buy a more profitable model).
The ZenPower ABTU005 model from the famous ASUS brand received a non-standard capacity of 10050 mAh - however, the real value that can be transferred to the batteries of charged gadgets is only 6600–6700 mAh.
The model weighs 215 g and takes up minimal space (while remaining too large for an ordinary pocket), has an original style and is available in several colors.
Alexey K.: Before purchasing this model, I already owned a similar device, but with a capacity of 5000 mAh. This power bank allows you to charge both a tablet with a 5000 mAh battery and a phone with a 2000 mAh battery at once. I didn’t pay attention to the design - I bought it because of the price. But my wife liked the appearance and often takes it to charge her smartphones. I didn’t find any shortcomings - however, I would like another USB port for connecting two phones at once.
A special feature of the ZMI Powerbank model is the minimum weight for this category - only 180 grams.
The dimensions of the gadget are also small, and the appearance of the front (or top) panel noticeably distinguishes it from other external batteries.
The capacity of the device is enough for 2-3 charges of an average smartphone or one restoration of functionality.
Anatoly V.: A good gadget for the money. Looks decent, even more expensive than it costs. The charge is enough for 2 phones. It takes a long time to charge, however, but this is not critical if you do it at home and at night. Another minus is that after six months of use, the charging socket became very loose, so I had to send it in for repairs, although under warranty.
The cost of the AP08Q power bank is one of the highest in the segment, although the model is distinguished by its ease of use and stylish body design.
Its capacity is standard for external batteries whose tasks include charging smartphones - 10,000 mAh.
A special feature of the design is the presence of an additional USB Type-C port, which speeds up the charging process and ensures simultaneous operation with two gadgets.
The manufacturer of the Power Bank Kettle design, the Samsung brand, has provided the gadget with a unique design and an unusual feature - connecting a special LED lamp on top.
Thanks to this feature, the external battery turns into a stylish and eye-catching lighting device.
However, it is also used to charge smartphones and tablets - however, a capacity of 5200 mAh is enough to increase their operating time by no more than 2–2.5 times (+100–150% of its value).
Tatiana Sh.: The Kettle design model from Samsung is a great gift for anyone for any occasion. I don’t recommend buying it for other purposes - you can find a more productive device at the same price.
When choosing a suitable power bank for yours, and, you should give preference to those models that best suit the tasks performed.
If you need to become the owner of a powerful device that increases the operating time of mobile gadgets several times, it is best to choose PowerPlantPower Bank 50000mAh K2 for laptop and one of two XiaomiMiPowerBank 2(20000 mAh and 10000 mAh) for other devices.
If the power bank should be a gift for the fair sex, models would be good options SamsungPowerBankKettledesign And ASUSZenPower 10050 mAh ABTU005.
Any gadget, be it a smartphone, e-reader or fitness bracelet, becomes a useless toy when its battery is completely discharged. And it often happens that not a single outlet can be found within reach. But today there is a very practical solution to this problem - external batteries. We tested 40 models of power banks at prices ranging from 750 to 5,000 rubles.
How a power bank works is easy to explain. The battery itself, which charges other devices, is located in the case. Mobile devices are connected to it for recharging using a USB cable. The most important criterion, which made up 50% of the overall score, is power. But first of all, we paid attention to the battery capacity.
The capacity of the devices we tested ranges from 1,700 to 20,800 mAh. True, these are manufacturers' data. The actual capacity is on average 34% less. We found the most significant difference in InLine USB Power Bank(20th place). According to the measurement results, the device capacity was only 2063 mAh, which is 48% less than the declared 4000 mAh. For the test winner, this difference was 31% (out of the declared 16,000 mAh, in reality, a little less than 11,000 mAh can be used).
How quickly an external battery charges a device, along with the charge level and capacity of the battery being charged, depends primarily on the output current. In this regard, the difference between the declared value and the measured value was smaller. Moreover, external batteries often produced more current than specified in the specifications. Anker Astro3 2nd Gen(3rd place) gave the best result - 4000 mA, but the owners Nokia DC18(37th place) with 730 mA you will have to be patient.
We also measured the self-discharge of the batteries. On average, external batteries with a full charge within two weeks are discharged by 5.4%. Retained charge almost without loss Voltcraft PB-13(14th place), Xtorm Powerbank Xtreme 9000 same from A-Solar(36th place) lost more than a quarter of its original charge.
A power bank is not only an external battery. Practical accessories such as a digital display and multiple USB outputs can make charging your mobile device much easier.
If you need to always know exactly how much charge is left, take a closer look at PNY. External batteries from this manufacturer are equipped with LED displays that display the exact state of charge in percentage.
If you constantly carry an external battery with you, you will probably want it to weigh as little as possible. Therefore, we allocated 30% of the total assessment to the weight of the device. They turned out to be the easiest and most convenient Pearl revolt Powerbank(31 pieces) weighing 66 grams and Nokia DC18– 62 grams.
The device with the largest capacity weighs the most at 429 grams, followed by our test winner at 318 grams. The decisive role in the relationship between mass and capacity is played by energy density, the amount of stored energy per unit of mass. The Voltcraft PB-19 turned out to be a leader here too.
We allocated 20% of the final result to the assessment of the configuration. We also included USB outputs here. 18 models are equipped with one connector, 21 – with two. Anker Astro3 2nd Gen- the only external battery that we tested that can connect three devices at once. And in order to be able to check the charge status at any time, the external battery must be equipped with either a display or LED indicators.
Capacity of almost 11,000 mAh and rich equipment. Plus a built-in flashlight as a nice bonus. The winner of the testing was .
for 1400 rubles in fifth position proves that a decent backup power supply for use on the road does not have to cost a lot.
A newcomer breaks records in terms of power. The measured capacity of more than 15,700 mAh and energy density of 183 mWh/g were unattainable by all other devices.
What unites all smartphones and tablets, no matter how modern and advanced they are? This weak point is always insufficient battery life and the ability to discharge at the most inopportune moment. This “Achilles heel” cannot be overcome even by the foresight of some users and the obsession with always leaving the house with a 100 percent battery charge. An unforeseen situation, a delay at work or on the road - and you remain cut off from the whole world, but an external portable battery could save the situation. There are thousands of them on the modern market: from outright junk to very serious and reliable devices. Let's try to figure out how to choose an external battery that meets the stated characteristics and fully meets your needs. Bonus – the best power banks of 2017 presented on the domestic market.
Power bank, aka an external battery, aka a portable or additional battery, is a small portable battery that can be used to charge a number of gadgets: smartphones, tablets, cameras, e-books and others that can receive energy via a USB cable. The battery itself must be periodically charged from an outlet or computer; it retains the accumulated energy for a long period, so the power bank can easily be taken with you to work or school, on a trip, or even to the ends of the earth - it will save you when you have access to an outlet and For some reason there is no electricity in it.
Inside the power bank is several batteries, connected to the controller board. The board also has a connector or connectors for connecting gadgets. Compatibility with a number of mobile devices is achieved through the use of a universal USB 2.0 connector.
An external battery can be of any color, shape and size - here manufacturers please us and offer many different options so that it is both functional and pleasing to the eye. The body can be made of plastic, polycarbonate or metal: in terms of practicality, all options are almost the same, but the metal case will make the battery somewhat heavier.
The higher the battery capacity, the greater the weight will be– do not buy models whose specifications state 20,000 mAh and weigh about 100 g. If you plan to use your smartphone while charging it from the battery, then it is better to choose the most ergonomic and convenient battery. If an external battery is needed only to reach normal charging, then you can choose a compact model with low weight. Some of them are even being implemented in keychain format.
It is appropriate here to mention the existence battery cases. In fact, this is the same external battery, and it has the same functions, but its significant disadvantage is that it is tailored for a specific smartphone model, and there is little practicality in this solution, so you will not be able to charge other gadgets.
Often, buyers who are wondering how to choose an external battery completely discount the type of battery used, being distracted by other characteristics. The durability of the device and its functionality depend on the parameters of the batteries used.
Modern power banks use two fundamentally different types of batteries:
The first thing that all those who are planning to buy an external battery look at is its capacity. This is the most important characteristic of the battery, which tells you how many times and what equipment can be recharged with it. You shouldn’t chase record highs – first you need to decide on the usage scenarios:
There is no point in taking a battery with a capacity of less than 4000-5000 mAh - in terms of price there will not be much savings.
Manufacturers sometimes like slightly exaggerate the actual battery capacity. Chinese companies without a big name often do this. There are glaring cases when a battery with a declared capacity of 58,000 mAh is supplied in a lightweight case (and this happens, see photo below). If you buy an external battery in a store, you can take it with you USB-battery capacity tester to check the stated figures. Such a tester costs 2-3 dollars in Chinese online stores. 
Important! Remember that the manufacturer reports the battery capacity taking into account the voltage of the built-in batteries 3.7 V. When connecting the gadget, energy is transferred with a voltage of 5 V, and then again converted to supply it to the smartphone with a voltage of 3.7-4.2 V. Due to double conversion, some energy is lost, and sometimes losses can reach 20-30%. Therefore, do not be upset if a 10,000 mAh battery can only charge a tablet of the same capacity by 70-80% - for now this is the norm and the cost of the technology.
Without going into details and technical aspects, then the higher the current, the faster the gadget will charge from a portable battery. When choosing an external battery, be sure to check with what current strength your smartphone or tablet can be charged, so as not to harm the gadget. The information must be indicated on the supplied charger.
There are models smartphones with charge controller, which limits the current. For example, the Sony Xperia Z3 controller has a limit of 1.5 A, and if you connect it to a battery with a 3 A port, the current will be limited, and the smartphone will still receive its 1.5 A - these are safety measures provided by the manufacturer.
Portable batteries that support the function can also be found on sale. fast charging. When using it, the voltage increases and the current decreases, due to which it is possible to replenish, on average, about 50-60% of the smartphone’s battery in 30-40 minutes (the exact data depends on the parameters of the power bank and the gadget itself).
Incorrect conditions of transportation and storage of the battery can negatively affect its actual capacity.
An external battery with several outputs and a small capacity will be of absolutely no use for obvious reasons, so there is no point in paying attention to such models. If the power bank has several ports, then you can use them normally if the capacity is at least 10,000 mAh.
One more nuance. Different ports, in theory, are designed to simultaneously charge a smartphone and a tablet, so the manufacturer often supplies them with different output currents, for example, 1 and 2 A. However, the 2A value is reached when only one device is charging, so when connecting two gadgets, most likely, both ports will supply 1A.
Not only does the external battery lose energy while charging your gadgets, but it is also subject to the process self-discharge. When you don't use the battery, it loses an average of 5% charge every two weeks. Moreover, the battery capacity tends to decrease over time, especially if the device is actively used: a high-quality product loses 15% of its capacity per year, and cheap models lose 35%. For charge level control all batteries are equipped with LED indicators (3-4 lights). An advanced option is a small display that displays the exact battery charge status as a percentage. 
By charging method External batteries can be divided into the following groups:
What do you think is a more convenient option? Naturally, the second one. Actually, this is why the first type of battery has almost completely disappeared from sale. Remember that charging the device from a computer takes much longer, and the presence of a USB Type-C port will speed up the process somewhat. Some power banks can be charged in record time thanks to the fast charging feature. 
An interesting option is charging using solar power cells. It’s too early to say that solar energy will be a full-fledged source of power for the external battery, but the solar panel located at the end of the device will be able to compensate for self-discharge.
Pay attention to external batteries with flashlights. They will be useful in case of power outages and outdoor trips.
One more thing. Most mobile gadgets today are equipped with a microUSB connector, and manufacturers often equip their devices with a universal cord, while owners of gadgets from Apple and relatively old equipment are better off paying attention to models with set of universal adapters. Most users don’t have to worry, as they can use the charging cord that comes with the smartphone.
When choosing an external battery, it is better to trust products from famous brands: this way there is a greater chance that the actual characteristics will correspond to the declared ones, and the battery will definitely last for the next few years. The external battery market today is oversaturated; there are so many manufacturers and models on it that it’s impossible to describe. Among the reputable manufacturers we can highlight Xiaomi (absolute leader in the field), ASUS, Momax, Samsung, TP-LINK, HIPER, Canyon and Remax. Choosing the best power banks is not easy, taking into account the different needs of users, so we will try to please everyone and find interesting models in different “weight categories”.
External batteries from Xiaomi are a guarantee of quality. The manufacturer strives to make functional, durable and practical equipment at an affordable price. Xiaomi smartphones have long been called the Chinese Apple, and in the world of portable batteries the company confidently takes first place and offers users several models at once. This option is maximally balanced in terms of price, quality and battery capacity. Among the main advantages metal body, fast charging, streamlined shape, the included USB – micro USB cable. In addition, it makes me happy rich color range and the presence of protection against overheating, overload, short circuit. Charge indicator – LED. A guarantee that your Xiaomi is original is a special code that is applied under the scratch strip; it can be checked on the manufacturer’s website. 
Similar to the previous model, but more compact, which means more mobile. It can easily hide in a pocket or purse and at the same time can recharge an average smartphone 1-1.5 times. There is no fast charging function, but the richness of possible colors and protection against overheating and overloads are preserved. By charging your smartphone with such a battery, you can continue to use it normally.
Xiaomi has created external batteries for all needs, and for those who need a large supply of energy with them, it offers a real beast with 20,000 mAh. He can simultaneously charge two devices, and plastic for the design of the case was chosen only because the battery would be too heavy in metal. Thanks to Qualcomm Quick Charge 2.0 technology, you can quickly charge the power bank, there is protection against overheating and overload, and an LED indicator, which you will have to put up with.
The company recently released a model with very similar characteristics - Xiaomi Mi Power Bank 2 20000. It received Qualcomm Quick Charge 3.0 fast charging technology, a maximum output current of 2.4 A and a Li-Polymer battery, everything else is the same.
ASUS has released a good competitor to Xiaomi banks. Clad in metal, the small portable battery has an average and quite sufficient capacity in most cases, as well as protection against overload and short circuit. LED indicator, huge choice of colors. To prevent the metal case from being scratched, it is better to stock up on a cover for it.
If you want to buy an external battery with premium appearance and wide functionality, then this model is for you. Coating done under the skin, there is an edge around the device chrome strip– the view is impressive. The performance characteristics are also good, especially the capacity and current. Users note that there is no self-discharge. In all respects, one of the best power banks today.
An elongated metal bar with a capacity of 16,000 mAh has replenished the lineup of legendary external batteries. Of the main advantages twoUSB-exit with the ability to simultaneously charge two devices and several degrees of protection. There is no fast charging function for the “can” – it will take about 9 hours to fully replenish the energy. The device is well-built and holds a charge excellently, as evidenced by user reviews. You can easily check a genuine Xiaomi device on the manufacturer’s website. Beware of fakes.
One of the significant advantages of the gadget is "big-eyed" design, the device looks really cool (this is how the charge indicators are implemented). The device is compact, fully meets the characteristics declared by the manufacturer, and its self-discharge is low. It is easy to use, fits easily into a bag, and is approximately the size of a 5.2-inch smartphone.
The model has a decent capacity and considerable weight, even despite its plastic body, and this, in turn, suggests that the manufacturer does not inflate the characteristics. The device can be easily charged two devices at once, LED indication. When purchasing, think three times whether it will be convenient to carry such a brick with you.
A small, light, compact and inexpensive power bank also captivates with its appearance, because he is dressed in leather. The build quality can only be praised, but the need for two ports with such a battery capacity remains in doubt. The excellent appearance lasts for a long time, because leather, unlike plastic and metal, is not so susceptible to scratches. The manufacturer has equipped the device with deep discharge protection. The result is a stylish and functional device.
Due to its shape, this cute power bank will fit perfectly in your bag. Other advantages: compact size and optimal capacity, as well as the ability to simultaneously charge a smartphone and tablet. Moreover, the device is equipped flashlight, and in Comes with a cover.
This device will become status accessory, because it has small dimensions and is dressed in leather. If you are looking external battery with display, which will reflect the degree of charge as a percentage, then this model should also interest you. For the sake of compactness, it was necessary to sacrifice capacity, but rather the manufacturer pursued the goal of creating a small power bank that can be used to recharge a smartphone 1.5-2 times if necessary.
Our review of the best external batteries is completed by another model from HIPER, which is interesting not only for its two USB ports, metal case and flashlight, but also the presence several adapters included, incl. for old and modern Apple and Nokia gadgets. There is even a card reader function, but it is unlikely to be useful to anyone.
Finally, we note that for the long life of your power bank, do not allow it to be deeply discharged. Charge it only with the amperage specified in the specifications. At critically high and low temperatures, try not to charge or use the device unless absolutely necessary.
Relevance: August 2019
For all mobile devices, autonomy is the weak link. A small amount of energy does not allow the user to fully enjoy the possibilities during the day. If we talk about flagship models, then the active work time can be several hours. For a long time, society had to carry a charger in a bag and depend on an outlet, but modern power banks have completely eradicated this problem. Different styles and case materials, total usable capacity and charging technologies allow you to choose an external battery for a specific smartphone or group of devices.
Among the large assortment, Xiaomi products stand out. The popularity of the brand is rapidly increasing, and in the production of power banks it can already be called a leader. The company achieved this result with an optimal combination of cost and characteristics.
Singaporean Rombica and American Goal Zero were awarded entry into the premium segment. Both companies make professional external batteries for charging any device. The main feature is the combination of the familiar with the high-tech - solar panels, inverters.
HARPER has successfully gained a foothold in the middle segment with a focus on tourism. The devices have increased durability and functionality for survival in extreme conditions.
The budget segment has always been the most popular, which is why a large number of Chinese craftsmen work here - Asus, TP-Link and Yoobao. They were joined by the European brand Hiper and the American Canyon. Their main task is to provide users with autonomy, so the devices have a large capacity.
For phones (smartphones) For iPhones 10000 mAh and above 20000 mAh With fast charging With wireless charging For tablets Charging laptops Up to 10000 mAh*Prices are correct at the time of publication and are subject to change without notice.
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When the battery of a smartphone or tablet is discharged suddenly and at the wrong time, it causes a lot of inconvenience to its owner - if there is no nearby access to the power supply in order to urgently recharge the battery of the electronic device. This is why an external battery was invented, or. With its help, the gadget can be recharged anywhere. It is portable, lightweight and easy to carry. For maximum convenience, you should consider purchasing it. But first you should familiarize yourself with the different models of power banks in order to choose the most suitable one. The rating of external batteries for 2016-2017 will help you to better navigate which model may be the most optimal for you.
The rating of external batteries, distinguished by their versatility, opens the model Rombica NS240 Quick. Customer reviews rightly put it in first place. In addition to micro-USB, it has two more connectors: USB typeC and Lighting, so it is perfect for the lucky owners of almost any portable gadget.
The word Quick means that this power bank has the ability to quickly recharge the device, and will also quickly recharge itself, provided that certain devices are compatible with its electronic specifics. Rombica is also remarkable because it itself is equipped with a modern lithium-polymer battery with a capacity of 24,000 mAh. The cost of this power is about 4,000 rubles, but this price will justify itself.
The main advantages of Rombica:
In second place among universal power banks is the Hiper MP 10000 model. Due to its low cost, around only 2,000 rubles, it is very popular among buyers. Hiper has a durable outer casing that is made from durable aluminum. The device can be easily put in a pocket or carried in a bag.
It comes with a large number of adapters, and also has a built-in special slot for reading SD-micro cards, which is very convenient if you connect this device to a tablet.
The main advantages of Hiper:
The third place is taken by the InterStep PB240004U device. Its distinctive feature is the ability to fully charge four gadgets at the same time. It produces a charging current from 1 to 2.3 A, and if the two strongest ports are connected in parallel, the owner of this power bank will be able to use currents of up to 3 amperes and even a little more. Those connectors that provide 1 A output can accept controllers of various modifications, so there is no doubt about the versatility of this external battery.
InterStep has a liquid crystal screen, with which you can always accurately know the indicators of its own capacity. An added bonus is the LED flashlight.
The main advantages of InterStep:
Customer reviews rightly put the external battery for the Hiper MP 7500 phone in first place. If you google it on the Internet, it turns out that there are simply no bad reviews about this power bank; it is the best among those that can optimally charge a non-gluttonous phone.
This Hiper is very compact, has a sufficient level of capacity and a fast charge option. The package includes a sufficient number of cables and adapters. Pleasant bonuses include a bright flashlight and the option to read flash cards, as well as the ability to simultaneously charge two mobile phones.
The main advantages of Hiper 7500:
In second place is the power bank for charging Xiaomi Mi Powerbank 5000 phones. It is very simple, inexpensive and can even get lost if you don’t keep track of it. However, its outer casing is made of durable aluminum, which ensures its maximum reliability, despite its external fragility and small size.
It costs no more than 1000 rubles, but with two connectors it can perfectly provide current to any phone suitable for it. It does not have a fast charge option, which is understandable at such a price. A good “budget” option for those who, apart from charging their phone, don’t need anything else. Of course, it is not suitable for phones that require a lot of power, because its capacity is only 4300 mAh.
The main advantages of Xiaomi:
The third place in this rating is occupied by the Hiper XPX 6500 power bank. Its main advantage is the liquid crystal screen, which shows the level of residual charge of the device as a percentage. The screen also displays the operating modes in which the power is in, the process of discharging current to the phone and the current level at the output.
It does not have a fast charge option, but you can charge the phone in accelerated mode. Externally, Hiper XPX looks very attractive because its body resembles leather, but it is just plastic with a very similar imitation. Bonus: a flashlight with two bright LED bulbs. The capacity indicator is quite sufficient to charge the phone two full times.
The main advantages of Hiper XPX:
The rating of external batteries for smartphones is opened by Xiaomi Mi Powerbank 2 with a capacity of 10,000 and 20,000 mAh. They already belong to the second generation of power banks, equipped with batteries that have an increased level of operating U. Such external batteries both accumulate and release a sufficient amount of electricity.
It should be borne in mind that large smartphones that consume a large amount of current can be charged by a Xiaomi power bank with a capacity of 10,000 mAh only once, and simpler ones can be charged 2-3 times, after which it will also have to be charged. In principle, such characteristics may be quite sufficient. In addition, this power supply can power phones that require low levels of charging current, which is important.
The capacious Xiaomi Power Bank 2 20 000 will be able to recharge a tablet.
The main advantages of Xiaomi:
In second place is the Gmini mPower Pro Series MPB1041 power bank. It has the ability to recharge itself directly while charging the gadget - due to the fact that it has the same power indicator at the output and input. You can also charge your tablet with it. Among the advantages are low weight and the option of charging via a USB port, which allows, for example, right in the car.
Main advantages of Gmini:
In third place is the Canyon CNE-CPB130. Not ultra-capacious, but with a very nice and attractive external design. It has three connectors, including two for output with the ability to pass different levels of current. With its help, you can easily charge powerful smartphones or tablets, but it does not support fast charging functions due to the simplicity of the model.
Having considered the most popular external batteries, you can decide on the choice for yourself, taking into account the specifics of your phone, smartphone or tablet. Of course, it is necessary, focusing on the capacity of both your device and the battery itself.
