Do you have enough battery capacity on your smartphone or tablet? If yes, then we are very happy for you. But if you regularly find yourself in a situation where “it’s only 19:00, but your smart phone is already at zero,” we recommend purchasing an external battery. What they are, what to look for, and how to choose the right battery - read our article.

Just 10 years ago, any mobile phone could hold a charge for up to 10 days without any problems, and situations with a “sudden” discharge were rare, and as a rule were the result of a faulty battery. Today, the owner of a smartphone capable of living for more than 10 hours in active use mode is looked at with admiration and envy, and the habit of carrying it with him Charger, or keeping several (at home, in the office, and in the car) looks as normal as morning coffee. Yes, progress. Yes, new technologies. But how many times have we been left without communication? important point due to a dead smartphone?

Of course, you can continue to use the archaic “dialer” from Nokia or Philips, which needs to be charged once every 2 weeks. Or you can buy yourself a magical device that is indispensable for the owner of a modern phone: an external battery.

External battery, what is it?

External battery, or PowerBank is a portable power source that can “feed” all your gadgets. Structurally, it resembles a regular battery of a portable device: batteries, of which there can be from 2 to 10, are connected to the controller board. On the same board there is a connector for USB connections cables from gadgets. And all this is wrapped in a durable (or not so durable) case. Compatibility with all possible devices is achieved through the use of a universal USB port 2.0, to which you connect the cable from your smartphone, tablet, MP3 player, camera, and any other device that supports USB charging.

The principle of operation is simple: first you charge the PowerBank itself from a 220V network (you can also via USB from a computer, but from the network it will be much faster), then connect your smartphone or tablet to the battery with a cable. PowerBank begins to release accumulated energy to the connected device. At the end you get a charged smartphone/tablet.

There is an even less common modification - the so-called battery cases. They are put on the device and also perform a protective function. But they have a big disadvantage, in my opinion - they are made only for a specific smartphone model, and are more expensive than their portable counterparts.

Advice: Do not buy very cheap PowerBanks. As a rule, they not only do not correspond to the capacity stated on the packaging, but are also very poorly assembled. This means their lifespan will be very short.

How to choose the right external battery for phones or smartphones?

In order not to waste your money and buy a good PowerBank, you need to be guided by the three main characteristics of these devices when choosing.

Total battery capacity

Most important parameter, which determines the battery life from one charge. The larger the capacity, the more energy the rechargeable device will receive. Capacity is measured in milliamp-hours (mAh, mAh), and is indicated both on the packaging and on the PowerBank itself.

Advice: container for comfortable use external source The power supply must be at least twice the capacity of the battery in your device.

For example, at Samsung Galaxy S5 battery with a capacity of 2800 mAh. Accordingly, for this device you should choose a PowerBank with a capacity of 5600 mAh and higher. This way you are guaranteed to get 1-1.5 full charges of your smartphone.

If you have not only a smartphone, but also a tablet, you need to focus on the total capacity. For example, a smartphone is 2000 mAh, a tablet is 4400 mAh. The total capacity is 6400 mAh, which means the capacity of the external battery must be at least 10000 mAh.

Current supplied to the USB connector

As a rule, this parameter is indicated on the included charger for your device. For smartphones, players, and cameras, the standard current is one ampere (1A), for tablets - 2A. This does not mean that you cannot charge your smartphone from a 2-amp connector. You can, charging will even happen faster. But it is better to follow the manufacturer’s recommendations to avoid device failure.

Advice: When choosing an external battery, give preference to one with a current of 2A. Even if you don't have a tablet now, that doesn't mean you won't have one in, say, 3 months.

There are some models that have 2 located on the body at once USB connector: one for 1A, the second for 2A, respectively. If you find such an option, and the build quality/manufacturer is not of concern, feel free to buy it.

Size, weight, appearance

Everything is simple here. The larger the battery capacity, the greater its weight and size. Choose PowerBank for your use case. If you need additional power only periodically, for example, in urban conditions, or if you forgot to charge your smartphone before leaving home, then a battery of 2-5 thousand mAh should be enough for you (depending on the capacity of the smartphone’s battery). If you travel regularly, carry your entire fleet of gadgets with you, and actively use resource-intensive applications, then we recommend paying attention to energy monsters from 10,000 mAh and above.

Advice: Do not believe the claimed high battery capacity in a device with compact dimensions. This, of course, is science fiction, and you will simply be wasting your money.

There's plenty more to portable batteries additional functions: built-in flashlight, charging panel sun rays, protected housing, etc. These “buns” are not so necessary for everyday use, but you will have to pay a lot extra for them. Therefore, pay attention to their presence only if you cannot live without them.

What is the minimum cost of a good PowerBank, or how not to lose money?

The cost of any product consists of the cost of components, the cost of assembly and packaging, logistics, manufacturer’s margin and seller’s margin. External batteries are no exception. The average cost of a factory PowerBank is +/- $20. Let’s add here the costs of logistics and the seller’s interest, and we get a price tag of $40. Of course, there are much more expensive examples, but $40 - average cost high-quality external battery.

Advice: when ordering a battery from eBay, AliExpress, or other similar international trading platforms, don't be tempted to buy a 20,000 mAh battery for $19.99. This is 100% deception. If you're lucky, there will be about 5000 mAh. The same applies to manufacturers unknown to you and famous brands at a very low price.

According to the unwritten law of meanness, a mobile phone always runs out of charge at the most inopportune moment. As a rule, a smartphone loses all its charge when you urgently need to find something on the Internet, call someone, or receive an important message. It’s good if you have a power outlet or laptop at hand, from which you can recharge at least a little. But what if such a nuisance occurs far from stationary energy sources? Fortunately, developers of portable electronics have found a way out of the situation by releasing external batteries (also called Power Bank). There are several types of such batteries, each of which is designed to recharge a specific device: smartphone, tablet, e-book. However, in this review we will talk about how to choose an external battery specifically for a smartphone, because it is these gadgets that most often “betray” their owner at inopportune moments.

What is an external battery and what types are there?

By design, a Power Bank is a portable lithium-ion or lithium-polymer battery with a certain capacity. Such batteries transfer charge to the batteries of mobile devices (in our case, smartphones). Their main feature is that they are able to store a charge over a long period of time. Another unifying factor is the compactness of such devices. You can easily carry them with you to work, take them on long trips and hikes. The modern market has a variety of models of external batteries, which may differ from each other:

• capacity;
• forms;
• interface;
• dimensions;
• color;
• material;
• the presence of additional design elements.

As for the material, everything is simple here. As a rule, the devices in question are made of metal, plastic or polycarbonate. Sometimes there are also combined models. If we talk about external design, we can distinguish two large groups of portable batteries:

1. Individual boxes- the most common design option. Such devices always have a nice design and compact dimensions. The main advantage of boxes of any shape is that they can have a solid capacity, which is enough to completely replenish the charge of several phones at once (their exact number depends on the battery capacity of the smartphones themselves).
2. Wrist bracelets- a modern and truly unique design option. Such devices are easier to carry (no need to allocate a separate place for them in your bag or pocket). Moreover, such technical innovations look quite stylish. However, they have one significant flaw: low battery capacity. Thus, such models are designed to partially replenish energy reserves so that the user can perform several important operations on the phone. Such products will not be able to completely “feed” the battery of modern mobile devices (unless you are charging a rather old smartphone model).

The operating principle of any Power Bank is clear: it connects to the device, and it begins to replenish its charge. But how to charge the external batteries themselves? There can be three ways here.

1. From a wall outlet or laptop. Models charging using this method are the most common. The operating principle is as simple as possible. The user connects the Power Bank to the network or laptop via a USB cable. Over a certain period of time, the battery draws energy from the connected source. When the energy reserve is completely restored, a special light comes on (although there may be other types of signal).
2. From a built-in dynamo. Without exaggeration, that's enough unusual way charging. With this device, the user rotates a special handle, which produces electricity. The main disadvantage of such devices is noise: during rotation there will be a strong buzzing noise, distracting others. Among the advantages are a decent battery capacity, long charge retention and, of course, a positive effect on the small muscles of the arms (a Power Bank of this kind will replace a wrist expander).
3. From the sun. This is probably the most modern option for replenishing energy reserves. Such batteries play the role of a miniature solar station equipped with special lenses. These lenses capture the rays and convert them into electricity. Such models are very popular in hot countries where the scorching sun is commonplace. Almost any Power Bank of this kind has a solid capacity that allows you to charge both smartphones and tablets from it. Moreover, the presence of such an external battery significantly saves household electricity. The only negative is that the catching lenses require close care, otherwise the device will stop working.

What to look for when buying a Power Bank?

There are many factors to consider when purchasing an external battery for your smartphone. We will look at 5 fundamental aspects that will help you make the right choice.

1. Battery capacity- this is, without exaggeration, the most important indicator of the quality of such products, affecting their practicality and, accordingly, price. To measure capacity, a special unit is used - milliamp hours. The modern market is filled with batteries of various capacities: from several hundred to several tens of thousands of milliamp hours. Choice specific model directly depends on the battery of your mobile device. According to experts, a Power Bank is considered suitable if its energy reserve exceeds the phone's reserve by at least 20%. If you want to use a battery that is enough for several charges, then you should give preference to analogues whose capacity exceeds the volume of a telephone battery by at least 3 times.
2. Current strength- a moment that directly affects the charging speed. To measure current, a unit such as ampere is used. In order for a smartphone to charge relatively quickly, the Power Bank must have a power equal to at least 1 ampere. If you do not meet this criterion, you risk getting a battery that will replenish its energy supply longer than a stationary power supply.
3. Compliance of the declared capacity with the actual one. Unfortunately, not all market players are honest. In order to attract buyers, they use all sorts of tricks. One of the most common techniques is to artificially increase the performance characteristics of a product. For example, the packaging may state 10,000 mAh, but in practice it turns out that the battery has only a 7,000 charge. An additional concern is the fact that among all external batteries, more than 70% have incorrect characteristics. Of course, reduced capacity is not always the result of tricks. The battery may lose some of its capabilities if the rules of transportation and storage are violated. For this reason, it is recommended to always check whether the declared capacity corresponds to the actual capacity. For this you need to use special devices. It is clear that such a check can only be carried out in a regular store, where the product is in front of your eyes. If a purchase is made via the Internet, you need to consider whether a particular online store provides a service for returning and exchanging goods. This is the only way to save yourself from wasting money.
4. External battery self-discharge rate. This is another extremely important point. As you know, any technical product wears out over time and its performance capabilities decrease. In this regard, Power Bank is no exception. With prolonged use, the battery capacity begins to decrease, as a result of which the number of charges that can be carried out suffers. Information regarding the self-discharge coefficient should always be clarified with consultants before purchasing. But there is one pitfall - not a single consultant will tell the whole truth on this issue. Here it is better to be guided by a simple pattern: over the course of a year, the volume of high-quality batteries drops by 10–15%; As for cheaper analogues, in 12 months they lose from 30 to 40% of their capabilities. In addition, it is worth remembering that in the absence practical application the accumulated charge is also consumed. Expensive batteries lose up to 10% of their energy reserves in 14 days. Cheap models can lose up to 30% of energy over a similar period of time.
5. Number of ports for connection. If you live alone and want to use the “energy bank” personally, one USB port will be enough for you (even if you have two smartphones). If you have a family where everyone needs a working phone, it is better to buy models equipped with multiple sockets for connection. Also, 2 or more ports may be needed if you decide to go camping with a group of friends. Naturally, the volume of such portable charges must be appropriate.

The most popular models of external batteries

Knowing the above information will come in very handy when purchasing a portable battery for your smartphone, but knowing the most best models similar devices will make your choice even easier. Let's consider best brands external batteries separately:

1. iPower 6- This is a fairly compact device that can be carried in your pocket. It has a cylindrical shape. The declared capacity of this device is 2600 mAh. It has 6 sockets of different standards, so iPower 6 is suitable for many types of portable gadgets.
2. SC-A120- one of the most compact models available on the market. The charge capacity is quite small - only 1900 mAh, so this device is suitable for replenishing a small amount of energy (for example, to make a couple of important calls). The battery is equipped with several types of sockets so that you can connect different mobile devices. Its highlight is the presence of two conducting paths to replenish energy reserves. The first way uses solar energy, the second - electricity from an outlet.
3. iPower13- an improved version of the first device. This model has a larger capacity - 8400 mAh. In addition, the case has rubberized inserts, which makes it shock-resistant.
4. Gigabyte Power Bank OTG G66B1- a practical option for an external battery with a capacity of 6600 mAh. Mobile devices are connected via a standard USB input, as well as via a micro-USB socket.
5. Metrans Power Bank- Very good model, the energy volume of which is 10400 mAh. The body of the device is made of aluminum, making the entire structure more durable. This Power Bank supports simultaneous charging of two smartphones at once. As for personal energy restoration, it takes about 6 hours.
6. Xiaomi PowerBank is a battery that is rapidly gaining popularity. Several versions of this model have already been released, with a minimum battery capacity of 5400 mAh. This perfect option for smartphones of the same brand.
7. Xiaomi PowerBank 16000- the best external battery of 2017 (at least for now). As the name suggests, this product has a 16,000 mAh charge. This volume is enough for both a phone and a tablet.

We should also highlight the Power Bank in the form of a bracelet. This device has a small capacity of 1500 mAh. It is enough to partially charge your smartphone. Of course, the small capacity does not allow bracelets to compete with other types of external batteries, but ease of use and the ability to become a kind of “magic wand” make them popular technical products.

Actual number of external battery charges

Many inexperienced users incorrectly calculate the number of possible charges. In particular, they believe that if they have a 9000 mAh external battery and a 3000 mAh smartphone, they will be able to use the “energy bank” three times and raise the charge of their device from 0 to 100%. Actually this is not true. Let's find out what such people forget to take into account.

1. Battery self-discharge- the point mentioned above. Even when the Power Bank is not in use, its energy is consumed. Of course, in high-quality models this happens slowly, but still, after disconnecting the external battery from the power source, it begins to lose its energy reserve.
2. The difference between the output voltage of the smartphone and the battery during charging. As a rule, this indicator for phones exceeds the same value for “energy banks”. To replenish energy reserves quickly, each Power Bank is equipped with a special circuit that artificially increases it output voltage. The result of this increase is that part of the available energy is spent on maintaining the charging process, rather than on the charging itself. This means that the phone is missing about 30% of its potential charge.

We can conclude that to calculate the number of charges, it is necessary to subtract 20–30% from the declared energy capacity of the battery and only then divide the resulting value by the volume of the smartphone’s battery. In addition, it is imperative to take into account how long the Power Bank has been lying idle, because a long absence of practical use also depletes the energy reserve.

Price of external batteries for smartphones

The price of external batteries for a smartphone in Russia starts from 600–700 rubles. These are the least spacious models. Batteries with a significant capacity cost 1500–1600 rubles.

So we have looked at the main aspects that will help you choose the right Power Bank. As you can see, there is nothing particularly complicated in this process. However, it is always worth checking the product characteristics and giving preference only to products from reliable manufacturers. This will save you from purchasing a low-quality technical product. The following video review is also devoted to the method of correctly purchasing “energy banks”:

Everyone calls this item differently, but they miss it just as much when the battery is low and there is no outlet nearby. The arsenal of gadgets is now not limited to the smartphone; it often comes with wireless headphones, smart watches, fitness bracelets, Bluetooth speakers... For their owners, the question of how to feed this entire menagerie is especially acute. We'll tell you how external batteries differ from each other, how to choose the right one for you, and how to use them correctly.

How much do your devices consume?

We need to start by answering exactly this question: after all, an amateur climber shooting with a GoPro camera and editing video on a tablet while mountain hiking needs more energy than an office manager swimming with a player in the pool. For clarity, here are the average battery capacities for some types of devices:

action camera: 900 mAh;

wireless headphones: 150 mAh;

music player: 1800 mAh;

wireless speaker: 3000 mAh;

smartphone: 3000 mAh.

Taking approximately these figures as a basis, it is enough to remember which devices you use most often and plan to charge; get something like this: 1800+150+3000=4050 mAh.

At first glance, this is the capacity that is needed in wireless charging to replenish the battery of all devices. In fact, it is advisable to multiply this number by another 20 percent to compensate for losses from heating, the influence of low temperatures outside and other factors. That turns out to be 5000 mAh.

The second characteristic that you need to pay attention to is the output voltage and current. There is no need to remember physics, because most chargers have an output current of 1 A or 2.4 A. The higher the current (A), the better. After all, smart portable technology can limit the current to the desired value, but it cannot get more.

In general, portable chargers are divided into five categories.

Pocket Helpers

How to calculate: capacity up to 3000 mAh

Such chargers are a chic addition to a car’s glove compartment, bag and backpack, as well as the inner pocket of a skier’s jacket. They are made, and they will help when you need to add a little more charge to your smartphone or power up your action camera. You can choose a compact charger based on your design preferences, and it is not at all necessary to study the characteristics of the output current: often the actual output current is 1 A, which means the charging time will be about three hours.

Signature Redline R-2600 2600 mAh with a current of 1 A

The power bank can be safely charged for future use so that it is kept just in case. The self-discharge of such devices is very slow; over the course of a year, your portable battery will only drain by 10–15 percent.

Workers for every day

How to calculate: capacity about 5000 mAh

These everyday chargers are most often found in the hands of passers-by and in the car interior, where it is possible to recharge the battery from the cigarette lighter. Convenient, compact and effective assistants for active smartphone owners who are unable to change the battery in non-separable device cases. And at the same time, lovers of short trips and trips on their own. You should choose such charges according to the output current from 2.1 A, and also give preference - the coolest battery cells are shaped like thick batteries.

Signature Huawei CP07 6700 mAh with a current of 2.4 A

Catering for a large company

How to calculate: capacity from 8,000 to 12,000 mAh

If you are a gadget addict and pay for purchases in the store not even with a smartphone, but with a watch, your collection of equipment can be fed with more powerful chargers. This capacitive group has a strong output current, and even accelerated charging technologies, so the design and number of ports for simultaneous recharge become the determining factor when choosing. Please note: often the second USB output is weaker than the first, so we recommend that you check this parameter in the specifications.

Ttec Powerslim 10,000 mAh with a current of 2.1 A

Accelerated charging technology significantly reduces the time to reach the cherished 100 percent on a smartphone battery. An hour, a maximum of one and a half - and the phone is completely ready for use. However, pay attention to what accelerated charging technology your gadget supports. QuickCharge, SuperCharge, Adaptive Fast Charging - all this different types, which are not compatible with each other. Thus, a smartphone can be quickly charged using SuperCharge (if it is a Huawei P10), and the Power Bank can support QuickCharge. In this case, you will be able to power the gadget, but the charging time will be normal.

Pocket power station

How to calculate: by capacity 15,000-20,000 mAh

Many of these are ready to charge even the MacBook 12 and other laptop models with a connector for USB charging Type-C. And at the same time, distribute energy to several devices at once without a drop in power on one of the USB outputs. These charging stations are good for everyone, but there is nothing to hide their size and weight. This ailment limits their scope of use, but if you need confidence in the operation of all equipment for several days ahead, there is hardly anything comparable to them in terms of efficiency of return.

InterStep PB16DQ 16,000 mAh with a current of 2.1 A

Wireless portable chargers

Apply your smartphone and see

More and more new smartphones are equipped with wireless charging modules of the Qi standard and analogues - for example, Samsung Galaxy S7, S8, iPhone 8, X. It is enough to put such smartphones on wireless charging, and the battery will start charging automatically. No wires or confusion, because the technology is based on magnetic induction. Most of the smartphones that support wireless charging operate according to the Qi standard, and recently, fast ones suitable for them have begun to appear. When choosing such charges, it is better to slightly increase the capacity reserve in order to compensate for the loss of energy for such an effective transfer process. By the way, such chargers themselves can be charged from stationary platforms.

Ferrari 10,000 mAh with wireless charging Qi

Instead of output

It’s not difficult to understand the variety of portable chargers if you compare the model you like according to the parameters and know exactly what capacity is required. It is not advisable to take extra chargers, because this will affect the convenience of carrying with you without bringing much benefit. Having decided on the appearance and capacity, make sure you have the necessary bonuses - wireless or fast charging, after which you can safely buy a convenient, practical and suitable device for you.

Contrary to popular belief, Power Bank does not damage the smartphone battery. Simply feeling that salvation is always at hand, gadget owners begin to use the device more actively, charge it more often, and thereby generally increase the number of charging cycles, which is limited for each battery.

Briefly about the main thing It is not necessary to purchase an external battery from a well-known brand, since it is no different in reliability and performance from models from lesser-known manufacturers. That is why we chose the most affordable devices that will never let the user down.
Best external battery The best external battery today is the model. She - optimal choice in terms of price/quality/performance ratio.	Best power bank with flashlight If it is important for you to purchase a model with a flashlight, but so that it also has high technical performance, then you can give preference. Although its battery capacity is slightly smaller than that of the Xiaomi model.

Modern people prefer to use smartphones instead of tablets and laptops because they are just as productive and at the same time more compact. But due to their small dimensions, their time is reduced. battery life: It is impossible to install a high-capacity battery in a small case.

To solve the problems that arise due to this, you can purchase an external battery for your phone. You will learn in the article how to choose, what characteristics to pay attention to and which models are the most popular today.

Top external batteries

Name	Capacity	Number of USB ports	USB port current	Battery level indicator	Flashlight	Price
	16000 mAh	2	1000/ 2 100 mA	There is	No	Check price
	10400 mAh	2	1000/ 2000 mA	There is	There is	Check price
	15600 mAh	2	1000/ 2000 mA	There is	There is	Check price
	10000 mAh	2	1000/ 2 100 mA	There is	No	Check price
	12500 mAh	2	1000/ 2000 mA	There is	No	Check price

Why is it needed?

An external battery (another name for Power Bank) is designed to charge a smartphone or other mobile device if there is no access to power supply networks. To do this, the device is connected to a mobile gadget using a special adapter cable.

Using a second battery to replace the main one is not always convenient. In addition, many modern flagship smartphones have a molded case in which the battery is non-removable. In this case, using a Power Bank is the best option.

Principle of operation

An external battery is a set of batteries interconnected and enclosed in a case that has a universal output (usually a USB port) for connecting an adapter. The case is made from plastic (cheap models) or aluminum.

After connecting the smartphone to the Power Bank, the standard process charging. These steps can be repeated until the external battery is completely discharged. Due to the fact that it has a large capacity, you can simultaneously or alternately charge two or more gadgets, or one mobile device several times in a row.

Characteristics

When choosing an external battery for your smartphone, pay attention to the main characteristics that will help you choose a high-quality and durable device.

Capacity

This main characteristic, which determines the performance of the external battery. It shows how long the device will provide the mobile gadget with energy.

This parameter is measured in ampere hours (Ah) or milliamp hours (mAh). In order for a Power Bank to work effectively and not cause any problems with it, its volume must be at least 2 times the battery capacity of the device it charges. But the larger this parameter, the better.

The larger the capacity of the external battery, the longer its operating period. But this increases the recharging time.

In addition, it is worth considering that the larger the capacity of the selected device, the more expensive it will be. The golden mean is 6000 mAh models. A Power Bank with a capacity of 15,000 mAh or more is suitable for charging a smartphone or even a tablet.

Current strength

The strength of the outgoing current affects the charging time of the device. The higher it is, the faster the smartphone will charge. For mobile phone the standard indicator is 800-1200 mA, for tablets 1500-2000 mA.

Good to know! It is advisable that this parameter coincide with the recommendations of the smartphone or tablet manufacturer.

Dimensions

Please note that the greater the capacity of the external battery, the larger it is, because it contains large quantity batteries. But in this case, everyone chooses a model for themselves depending on the requirements that they place on it.

For fans of hiking, a Power Bank is suitable large capacity and dimensions. And for users who recharge their smartphone in order to “sit” in in social networks A compact and less capacious option is suitable.

Avoid buying models that offer large capacity in a compact package. These are tricks that are used to increase sales.

Peculiarities

Different Power Bank models may have their own characteristics.

1. Number of slots. Some models have several sockets for simultaneously connecting two or more gadgets. In most cases, they have different output current strengths: 1000 and 2000 mA for charging smartphones and tablets, respectively.
2. Cable with adapter set. Such devices are suitable for new as well as old smartphones that do not use Micro-USB or USB Type-C, and other connectors.
3. External battery charging method. When buying an external battery, choose a model that charges via a Micro-USB socket. This will allow you to use a regular smartphone charger to charge it.
   There are Power Bank models with solar panels installed on the body. Basically, they compensate for the effect of self-charging of batteries, but they are not suitable for fully charging the external battery itself.
4. Battery level indication. The indicator will tell you how much energy is left in the external battery and when it needs to be connected to the network for charging. This is a convenient option, but it affects the cost of the model.

The best choice

Xiaomi Mi Power Bank 16000

The best choice!

The main advantage of the model is excellent quality, high reliability and affordable cost. Thanks to the metal case and large battery capacity, you can easily charge the same gadget several times in a row (5 times or more).

The presence of two USB ports allows you to simultaneously charge several devices, but their close location will not allow you to connect two massive plugs at the same time. In general, this is where the disadvantages of the model end, so it is best choice for purchase.

Advantages

• frame;
• battery;
• battery level indicator;
• 2 USB ports;
• price;
• output current 2000 mA.

Flaws

• location of USB ports.

TP-LINK TL-PB10400

Unfortunately, due to the large volume of batteries, the battery case had to be made square, which is not always convenient to use. In addition, it is made of plastic, although reliable. This made it possible to reduce both the weight and reliability of the Power Bank.

The current strength at the two outputs differs: 2000 and 1000 mA, so you can choose which device to connect where.

The presence of two USB ports, a flashlight and a battery charging indicator allows you to operate the device comfortably and easily. Although the flashlight is of average quality.

Advantages

• battery;
• charge level indicator;
• 2 USB ports;
• flashlight;

Flaws

• frame;
• flashlight.

Yoobao YB665

Price: 3,000 rub.

Glossy plastic made the device stylish, but easily soiled, so it will need to be wiped constantly. Although the cost of Yoobao YB665 is quite high, its range of functions and reliability will allow it to be used for a long time. In addition, the Power Bank comes with a charger and adapters for iPhone.