Battery for additional phone charging. Choosing a portable charger: how to buy the right external battery (Powerbank) - EcoTekhnika. Which Power Bank is better to buy?

Every year new smartphones appear, more and more powerful and voracious. Innovations in the field of batteries are not yet expected, which means that a power bank (power bank, external battery, portable battery) remains the only solution for those who often live far from outlets.

What are the differences between external batteries?

Portable power supplies, unlike smartphones and other types of advanced technology, cannot boast of much variety. And this is quite logical. Batteries - they are batteries, but you still need to know something about them.

Capacity and related dimensions

The most important parameter of an external battery is its capacity, which the manufacturer usually indicates in milliamp-hours (mAh). Roughly speaking, this is the amount of energy that a battery can store (but not transmit).

Please note: due to the fundamental laws of physics, no external battery can transfer 100% of the stored energy and no smartphone can fully absorb the energy received. Part of the resource is always lost during voltage conversion, and a certain amount goes into heat.

On average, total losses range from 30 to 40%, although some (and usually more expensive) models of external batteries and smartphones can boast efficiency of about 90%.

Thus, it is incorrect to determine the number of possible charges of a smartphone with a known capacity of the built-in battery from a power bank with a known capacity using simple division. The loss factor must be taken into account. Moreover, for reinsurance, it is better to take it at the upper limit, that is, at least 35%.

To put it simply, a power bank with a declared capacity of 10,000 mAh will in practice transfer approximately 7,500 real mAh, which means it will fully charge a smartphone with a battery with a capacity of 2,500 mAh not four times, but only three.

Please note that the above calculation is a very average and quite optimistic. Check real charging losses specific smartphone from a specific external battery is only possible in practice.

In addition, physics requires a direct relationship between the capacity and mass of the power bank. To store more energy, the battery must be heavier and larger.

Connectors

The vast majority of external batteries, and especially those, are sold without cables. It is assumed that you will use the cord that came with your smartphone. Accordingly, the connectors on the battery and cable must match.

It may seem that you don't need to pay attention to connectors because all smartphones have the same wire with standard full-length USB on one end and microUSB on the other, but this is not so.

For example, the included Nexus 5X cable has USB-C on both sides. And in order not to buy additional wires, you will have to look for an external battery with just such a connector, both output and input, or purchase an adapter.

Kanex GoPower Slim Aluminum USB-C

Some manufacturers, such as Motorola, include a plug with a permanent cord in the package of certain smartphone models. In this case, purchasing an additional cable is inevitable.

There are power banks with a built-in cable. In this case, it is important to make sure that the connector fits your smartphone.

EasyAcc iChoc 5,000 mAh Ultra Slim

External battery current output and fast charging

The external battery charges the smartphone, which is great. Even better if he does it quickly, right? The charging speed depends on many parameters, but the determining factor is the output current of the power bank. It must be no less than that provided by the smartphone manufacturer.

It’s easy to find out the optimal amperage for your smartphone. Take the plug that came with the device and look at the OUTPUT value.

Output current

It will say something like 5 V - 2 A. You need the number next to A because current is measured in amperes.

You can find out the output current of the power bank in the description or instructions. If an external battery has more than one output connector, the current strength is sometimes indicated directly on the case next to each connector.

HP 7,600 mAh Power Pack Slim Portable

If you have two or more connectors, remember that the total current output of the power bank is limited. For example, a battery may have two outputs of 2.5 A each, but produce no more than 4 A in total. Accordingly, when two devices are connected at once, each of them can receive no more than 2 A.

If the output current of the external battery is less than that for which the smartphone is designed (for example, 1 A for a power bank and 1.5 A for a smartphone), then charging will still occur, but noticeably slower.

There is no need to be afraid if the power output current of the external battery is higher than what it is designed for. mobile device(for example, 2 A for a power bank and 1 A for a smartphone). Mobile devices have built-in protections that limit the amount of incoming current to an acceptable value. Simply put, your smartphone will not explode or melt.

For the same reason, your mobile device will not charge faster if you use a plug or power bank with an output current higher than that provided by the manufacturer.

Let's say you find an external battery with a suitable output current, but the supplied plug still charges the smartphone faster. What's the matter? Most likely, your smartphone supports some kind of fast charging technology like Quick Charge 3.0, Quick Charge 4.0 or a variant with its own name from a specific manufacturer (for example, mCharge from Meizu). Look for a power bank that is compatible with the fast charging technology used in your smartphone.

Now power banks with smart fast charging technologies like PowerIQ are gaining popularity. In theory, they recognize the device connected to them and supply the optimal current for it, but in practice this does not always work and not with all smartphone models.

External battery input current

No matter how capacious an external battery you buy, its own energy reserve will sooner or later be exhausted. It’s nice when a power bank quickly charges a smartphone, but it’s even nicer if it charges quickly itself.

The charging speed of a power bank is determined by its input current, voltage and the presence of one or another technology that ensures more rapid replenishment of its own charge. There are now external batteries that can be fully charged in less than 30 minutes.

Please note: the power bank's own charging speed does not affect the speed at which it charges the smartphone.

But lack of understanding of technology and gaps in English knowledge can mislead the user. For example, you see a power bank that says something like 5 minutes charge. You might think that this miracle device charges your smartphone in 5 minutes, but in reality everything is different.

Let's say the capacity of a particular battery is 10,000 mAh and it is fully charged in 20 minutes. In this case, in 5 minutes it will replenish approximately 2,500 mAh. And this charge is really enough to charge a typical smartphone.

The problem is that the charging time of a smartphone is limited by its own maximum input current and the availability of support for one or another fast charging technology.

Simply put, the pretentious phrase 5 minutes charge actually means: “This power bank only needs 5 minutes to get the charge necessary to further fully charge the smartphone.” Don't get caught up in marketing hoaxes and improve your technical literacy.

The best external batteries

Lifehacker invites you to compile a reader's top powerbanks. Write in the comments the names and characteristics of the models you use and your opinion about them. If there is already a comment with your model, please add it and add your experience of use.

The models with the most positive ratings will be included in the “Best External Batteries of 2017” selection, which we will publish.

Other guides to choosing equipment from Lifehacker.

The phone always runs out of charge before an important meeting or during a business call, and the tablet “dies” a couple of minutes before winning the game. A portable charger will help you avoid unpleasant situations. How to choose exactly the kind of external battery so that it has maximum number charges? Suitable for both phone and tablet? In the review you will find the main specifications, which you need to focus on when choosing, and reviews about different models batteries.

Power Bank - what is it?

Just 10 years ago, phones worked perfectly without recharging for a week. Today, a device performs so many functions that its battery needs to be recharged regularly. In order not to ask employees for a charger and not to run around the shopping center looking for an outlet, it is better to just stock up on a portable charger. The battery can be carried in your pocket, bag, or in the glove compartment. But how much it can weigh and whether it can charge one or 2 devices several times is a separate conversation.

Power Bank, or external battery, is a portable power source for charging any gadgets. It consists of batteries (from 2 to 10) connected to the controller board. There are 1 or 2 on the battery USB port a, to which you can connect a phone, tablet, video camera, camera, etc.

The device works like a storage device. First it charges from the mains, then generously shares energy with any connected devices.

Before you start choosing a model, you need to decide:

What are you going to charge with the battery? How many devices?
How many times a day will you need a portable power source?
What size and features should your battery have?

External charger capacity

In practice, buyers choose a portable battery based on the size, design and color of the case. Then they buy a new one if this one is not satisfactory. It is much more practical to immediately take into account the main technical characteristics. The most important of them is the capacity of the device.

The main task of the battery is to release the accumulated energy. The question is how much the Power Bank can hold and deliver, this is capacity. The capacity is usually indicated on the case or in the device documents.

Advice. If you liked an external battery with an impressive capacity and a relatively low cost, then most likely it is a fake with low-quality components.

The difficulty is that the amount of energy received and transmitted is slightly different, because some of it is lost during the transmission process.

Some unscrupulous manufacturers, taking advantage of this moment, indicate the amount of energy received rather than given. Experiments have shown that the average amount of transmission losses is 20-30%. This means that a charger rated at 1000 mAh can charge a smartphone at 700-800 mAh. It is almost impossible to check this when purchasing, which means you need to choose products from well-known brands.

Attention! It is better to purchase a charger with a capacity that is twice that of a phone or tablet battery.

If your phone has a battery capacity of 2800 mAh, a charger with a rating of 5600 mAh or more will be suitable for it. If you are charging two devices, then you need to add their capacity and multiply by 2. And when purchasing, be guided by this figure.
The average option can be considered a Power Bank with an indicator of 6000 mAh; with it you can charge a smartphone within 2-3 days. For phone and A tablet will do universal version with 12000 mAh

The strength of the outgoing current supplied to the connector

The output current is the second parameter that needs to be taken into account when choosing. The fact is that the current strength partially affects the charging speed of the device.

Attention! Holders Apple tablets A 2A charger is suitable. This indicator is usually indicated on all portable batteries next to the connector.

Standard USB port with a current of 1A for phones and 1.5-2A for tablets. When purchasing a battery, you need to ensure that the charging current matches the device you are going to charge. Or choose a universal battery.

Apple Iphone, video cameras and players match the battery, which has a current strength of 1A. For iPad this figure increases to 2A. This means that if you are going to charge your phone and tablet at the same time, you need to select an external device with two connectors, 1A and 2A.

Theoretically, you can charge a smartphone with a 1A rating through a 2A connector and it will “come to life” faster. Or, conversely, charge the tablet through the 1A port, which will be much slower. But it is better to follow the device manufacturer's recommendations.

The input current refers to how quickly the battery itself charges. The same principle applies here. The current strength must be equal to or exceed the battery capacity, then it will be recharged at high speed.

Features of the portable charger housing

On the one hand, I want to use a light, compact battery that fits in my pocket and won’t weigh it down. On the other hand, for full, comfortable charging, a large capacity is required. How can you find the optimal ratio?

Attention! Experts warn that small, cute batteries with a large capacity do not exist in nature! The higher the capacity and the more connectors on the charger, the larger and heavier the device itself will be.

The way out of the situation is simple; you need to choose a Power Bank based on individual needs. Calculate how many times a day you need to charge one or two devices. In accordance with this indicator, purchase a battery. Experienced users advise adding a small margin to the resulting figure. In case you decide to go on vacation with friends and share exercises with them.

Additional features of the portable charger

You can often see batteries with additional features. Let's list the most popular "chips":

Charger with flashlight. Such a battery can be useful if it is small enough to fit in a pocket or in a nearby bag compartment. Manufacturers usually use an LED as a flashlight, which operates on a minimum of energy and is not capable of draining the battery.
Battery with built-in solar panel. On the one hand, this solution is very environmentally friendly, because the Power Bank can be charged not only using a computer or outlet, but also using sunlight. The downside is that such charging lasts at least 3-4 days, provided the weather is good.
External charger, plus Wi Fi router. Such batteries combine two functions: they charge and work as a router, that is, they distribute the Internet.
The user may find the automatic power off feature useful.
All batteries have a built-in charging indicator in the form of “sticks”, which over time can give incorrect information. A digital indicator with a display is much more accurate and reliable, but adds about 20% to the cost of the battery.

In design and color, portable chargers can be bright and interesting or strict and businesslike. For example, the Gmini company produces batteries that look like stones.

To questions like: “Which portable charger is best to buy?” Experienced owners of high-quality devices unanimously advise not to save money, but to purchase batteries from trusted brands. A lot of examples and photos with a battery and two bags of sand in a beautiful case make you doubt Chinese-made products.

Experts believe that the average cost of a high-quality Power Bank is $40. Purchase external device It can be much more profitable on the Internet, but it is better to buy it in a store, where they provide all the documents and a guarantee.

How to choose an external battery for your phone - video

A portable charger is a very useful thing that will be useful to every owner. modern smartphone. In particular, PowerBank will become an indispensable device for lovers of hiking and long trips. The choice of models is simply huge, so finding an option that would completely suit you in terms of basic parameters and cost will not be difficult. Below we will talk about what you need to consider when buying an external one, and which of its characteristics are most important.

Charger capacity indicator

This parameter determines how functional the power bank will be. It also has a significant impact on its weight and price. The units of capacity are ampere-hours. (abbreviated designation - mAh in Russian and mAh in English).

How can you find out which PowerBank capacity is best for you? In this case, an important role is played by which gadget will be charged most often. If it is a smartphone, then the capacity of the external battery should be at least 1.5 times greater than the battery. It is desirable that this parameter be higher and allow you to charge a completely dead phone at least 3 times. The efficiency of any portable charger is less than 100%. This indicates that energy loss cannot be avoided during the charging process. It is difficult to name their exact volume. It all depends on the quality level of the installed battery. In other words, if you have a PowerBank with a capacity of 5 thousand mAh, you will not be able to use it to fully charge a 2.5 thousand mAh battery twice.

Pay attention to detail

Sometimes connectors are made poorly. In particular, this applies to power banks that are produced by little-known companies. Reliable manufacturers do not see the point in saving on cheap parts, but small ones do not disdain even this. To avoid getting into trouble, carefully inspect the portable charger before purchasing. If the connectors seem flimsy to you, then it is better to refuse such a purchase, because in the future you will experience significant inconvenience when connecting a smartphone or other gadgets.

Complete set of phone charging models

Very often, the package includes, in addition to the external battery itself, several adapters. Among them it is necessary to highlight:

Micro USB, designed to connect modern tablets and smartphones.
Lightning, compatible with Apple technology.
Mini USB, thanks to which you can charge old phone, player, camera, etc.
An outdated adapter for gadgets from Apple.

As you can see, the list is not so bad, because there will definitely be a cable in it that will fit your existing device, but it is better not to use it. The fact is that the quality level of any of the adapters listed above usually leaves much to be desired. It will quickly break down and can also negatively affect the condition of the gadget. Thus, if you purchased a power bank from a little-known manufacturer, then be on your guard and do not rush to connect cables, which can only cause harm.

Comes with a new charger network adapter to him. It will definitely come in handy when you need to connect both a smartphone and a PowerBank to an outlet. In this regard, it is better to have two adapters with you.

Availability of indicators

Some models of portable batteries have built-in indicators. Using them, you can find out information about the remaining accumulated energy, or the time remaining until fully charged.

An excellent choice would be a model equipped with a small display that will display data on the status of the power bank. Despite this, you should not make the presence of indicators one of the mandatory requirements for a portable charger. If you find a portable battery that you are completely satisfied with and has flashing lights, then feel free to buy it rather than looking for a device with a screen that has similar parameters.

What should the body be like?

The material from which the PowerBank case is made does not play any significant role. It serves a purely aesthetic function, so choose what you like. There is an opinion that a metal case will always be better than a plastic one. It’s easy to disagree with this, because the most important thing is the “filling” and reliability of a portable battery, and not its appearance. Meanwhile, we can recommend a power bank with a casing coated with “SoftTouch” coating. It is pleasant to the touch and slightly rough. The main advantage is that the Soft Touch layer provides reliable grip and reduces the likelihood of the battery accidentally falling out of your hands. If we talk about the strength of the case, then it should be high, but the presence of shockproof coating is not necessary.

The 10 thousand mAh power bank from Xiaomi has a simple and at the same time stylish design: the company logo is emblazoned on the metal body. Looks very attractive. There are also models with unusual designs. For example, one of them is PowerBank Emie Devil Doodle. This device costs about $50, but it works stably and looks beautiful. The only drawback is that you can only purchase it online by ordering it on one of the Chinese websites.

PowerBank Manufacturer's Choice

This is a very important criterion that must be taken into account when purchasing an external battery. Meanwhile, this does not at all mean that you need to purchase an expensive model produced by a well-known company. Currently, Chinese power banks produced under well-known brands are in high demand: TP-LINK, Meizu, Drobak, Xiaomi, Sony, etc. Products from Xiaomi lead in terms of sales. This company has established itself as a reliable manufacturer of not only portable chargers, but other “smart” technology, for example, pedometer bracelets.

It’s not worth buying a PowerBank of dubious manufacture because:

The difference between the capacity stated in the documentation and the actual one will be significant;
The quality of adapters and connectors will leave much to be desired, which will cause significant inconvenience when using the device;
The likelihood of a quick breakdown will be noticeably increased;
There may be problems with warranty repairs.

Are additional features needed?

The range of portable batteries is quite wide. In this regard, it will not be difficult to purchase a device that will have additional functions. Some power banks are equipped with card readers, Wi-Fi modules, memory cards, etc. Whether they are useful or not, everyone decides for themselves. The most important thing is not to buy a battery that is too cheap, or made by a little-known company, because such a purchase will most likely only bring a loss.

As for successful examples, the Kingston Mobilelite G2 has wide functionality. Price of this device is about $50, but it's really worth it. This charger will definitely appeal to owners of iPhones and other smartphones that do not support memory cards, which leads to problems with battery life.

If you want to buy something special, then pay attention to power banks that charge from direct sunlight. This option will most likely appeal to lovers of summer hikes. Despite this, we should not forget that the weather may be cloudy, charging time may take longer, and the weight of such a device is quite large.

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 output voltage and current strength. 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 charging connector USB 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. Just put these 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 that you have the necessary bonuses - wireless or fast charging, after which you can safely buy a convenient, practical and suitable device.

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.

Modern Cell phones They impress with their graphics and functionality, allow users to run 3D games and watch videos in HD resolution, but they have one significant flaw: they discharge quickly. Of course, the user can wear a budget “dialer” from the company as an addition to the main gadget, which will allow him not to miss an important call, but this is inconvenient. It is much more efficient and rational to buy a smartphone instead of a spare phone.

External batteries for smartphones and tablets are portable power sources that are structurally similar to conventional batteries: the controller board combines up to 10 batteries placed in a reliable housing.

It’s easy to use: you first need to recharge it from a 220 Volt outlet (you can also use it from USB, but it will take longer), then when the smartphone’s battery is depleted, connect the external battery and the gadget with a cable. The battery will begin to transfer energy. A fully charged portable battery is usually enough to charge a smartphone several times from 0 to 100%.

There is a modification of the portable charger: a battery case that also performs protective function. Such cases are manufactured under specific models, and therefore cost more.

External batteries: types of products

There are only three types of portable chargers known:

Lithium-ion. These are the products that are most often found in store windows. The advantages of these chargers include safety and efficient energy consumption. There are two disadvantages: firstly, they break down quite quickly (especially with constant use), and secondly, buying such a device will cost a pretty penny.
Lithium polymer. These batteries are considered improved: they have adopted all the positive characteristics of lithium-ion chargers, while receiving a reasonable price. However, it is difficult to find them in stores: you have to order online, and the cost of delivery kills all the benefits.
Nickel—cadmium. These are aliens from a “past era” - such batteries were used to charge the first phones and were popular due to their minimal cost. Now they are almost never produced: firstly, they have been proven to be harmful to health, and secondly, their impressive size does not allow them to be called portable.

The type of battery should be indicated on the packaging and on the price tag (less often). You should first decide which type is more suitable, and base the choice of an external battery for your smartphone on this decision.

How to choose the best external battery: basic criteria

It is worth paying attention to 3 main parameters of portable batteries:

Total battery capacity. This parameter characterizes the battery life from a single charge and is measured in milliamp-hours (mAh). The rule applies: the capacity of the external battery must be at least twice the capacity of the gadget’s battery.
Current strength. This parameter is indicated on the factory charger. A current of 1A is usually suitable for smartphones, and 2A for tablets. You can charge smartphones from a 2-amp battery (charging will occur even faster), however, tests confirm that when increased strength current gadgets are breaking down. The best option– choose a battery with two connectors of different strengths.
Size and weight. How more capacity battery, the more massive the device itself. The buyer must proceed from his personal needs: if he purchases a battery for periodic use in urban conditions, then 5000 mAh will be enough, but if he intends to travel and wants to charge several gadgets at once, it is not worth taking less than 10 thousand mAh. It is important to remember: a device with compact dimensions cannot have outstanding capacity. Offering such a device is simply an attempt to mislead the buyer.

Top 3: rating of external batteries

According to reviews, it is worth paying attention to the following models of portable chargers:

Conclusion

Choosing which external battery is better based on color, shape or the presence of a monochrome display is stupid: these are secondary criteria. First of all, you need to pay attention to the current strength and capacity of the battery - inattention to these parameters can lead to the fact that an expensive gadget will be disabled. The brand should also be evaluated: it is better to put aside Chinese “know-names” and prefer products from such well-known manufacturers as InterStep and Hiper.