Buyer’s guide. Choose an external battery for smartphone or tablet

I once again discharged a phone. a couple of hours on social networks, downloading new podcasts of 400 MB with a 3G network, several photos. And the battery was my handle. Unfortunately, for many people, this scenario becomes reality daily. Sometimes, talking to friends, I hear a squeak, and then the conversation is interrupted. They call back from the second number and say sacramental: “Phone CD”. The presence of charger in the machine, in the workplace. by no means panacea. Someone you used to carry with you charging and in restaurants chooses places closer to sockets. How my buddy jokes, the phones have become wired again, but now we are tied to an electrical outlet.

One of the partial solutions of this problem is the choice of an external charger, which can be worn with you in the bag, take on trips and trips. The cost of such devices varies in a very wide range, the number of manufacturers is large, and often eyes run away from a variety of proposals. This guide will be dedicated to how to choose the external charger correctly, but before moving to this question, I will allow myself to dissuade you.

How to choose Powerbank

When choosing a good external battery, you need to make sure that its characteristics are conforming to the user needs. Although all Powerbanks are designed to recharging wireless devices, they differ in the main and secondary parameters.

Experts in the field of digital devices provide several useful recommendations:

  • Choose a model with a suitable capacity. The average is a capacity of 10,000 mA / h, it is enough for 2-3 cycles, more powerful allow you to recharge the phone 5-6 times or connect the energy-intensive technique. tablets, laptops. It is important to remember: the useful (actual) container is 60% of the claimed nominal.
  • Current at the output determines which devices can be charged. For smartphones, there is enough indicator in 1-2 A, for tablet computers and laptops. 3a.
  • High-speed charging support allows you to reduce the time cycle of the device or PowerBank itself. This criterion is not key, but makes use more comfortable.
  • Dimensions and weight depend on the capacity, the more powerful the battery, the greater and harder. The choice must be founded on what is more important for use: mobility or number of cycles on one charging.
  • Corpus material. External batteries are released in plastic or metal. The first is easier, but less resistant to mechanical damage, the second is more practical, but somewhat more expensive.
  • Number and type of ports. Some models are equipped with two or more outputs, which allows you to connect two devices at the same time. Also worth paying attention to which connectors. USB Type-C, Micro.

Often Powerbank comes complete with a cable, but the regular wires are distinguished by a small length that is not always practical. Therefore, the availability of accessories must be approached on the basis of how much they will be useful in use.

Fast or wireless charging. there is harm or it is missing?

There is a resistant myth that fast or wireless charging kills the battery. This is a myth, but he is extremely harmful, and there are witnesses that claim that the battery in their phone quickly comes in disrepair, loses the nominal capacity. They even lead to confirm this screenshot of purchased programs, tracking the number of charging / discharge cycles, battery capacity. Logical flaw lies in the fact that there is no control group from the same smartphone, with the same set of software and a profile of use, but with slow charging. I am sure that the scatter of the battery will be laid in a statistical error.

The biggest harm to the battery makes heating, more precisely, overheating batteries. He will continue to work in all conditions, in the end, we use smartphones even in sugar, where the temperature often exceeds 40 degrees Celsius in the shade. But the question is that it is not very useful in the long run, the battery resource will decline. And here you need to divide this question for two. there is a battery heating when charging (any charging, only the degree is different), as well as heating from external conditions, which depends on the air temperature, direct sunlight. It is not worth afraid of heating, this is part of the life of the battery. But if you have the opportunity to charge a smartphone without placing it on the battery, under the right sunny rays, on the car torpedo, it will be a great help for him.

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I recently watched a very interesting scene, the girl passed his smartphone into the service center. he did not work as it should. Caught already the stage of anger, when a cute young lady was to her legs, screamed and demanded blood. Her dear smartphone was broken, and in the service refused to repair it! From the explanation of the unfortunate master, which he already gave the tenth, and perhaps the hundredth time, one could restore the picture of the disaster. The girl charged the smartphone when she took a bath (never do it, you can kill yourself!), the closest place to put the phone turned out to be a battery radiator. The “marriage” recognized by the girl was that the smartphone was usually charged quickly, and on the battery refused to do it and was burning (although, according to her, the battery was not so warm). Heard the arguments of the master she refused, threatened by the court and heavenly punishes. In her worldview, such an expensive phone should be able to charge anywhere. I especially liked the passage: “Yes, even if I wanted to charge it under water, he should work. But I’m not a fool, I studied well at school, I know that the current in the water is bad, can hit hard. I do not do that! But on the battery it interferes. “.

Santa people know that the heating of the battery begins to occur when the charge reaches 80% of the nominal capacity, it is the same stage when the battery wear rises. It turns out that there are people who track how the battery is charging, and remove their smartphones with charging when they reach 80%. Of course, if you like to do it, you can do so, feel. But this is a completely useless occupation, since modern smartphones are capable of regulating charging themselves, avoid overheating.

Let’s look at the same S20 Ultra, the kit includes fast charging for 25 W, separately you can buy a 45 W charger. And here it begins the most interesting thing. to charge the battery to 100% in about 70-75 minutes. The difference turns insignificant.

In 30 minutes, a 45 W charging device charges a battery by 70%, but charging from the kit for 25 W charges up to 62%. As for me, so this difference is absolutely not principled. Why is this happening? The restriction is the heating of the battery, to charge in 45 W, it is stronger when it is achieved 70-75% of the nominal capacity, so the charge rate decreases, and ultimately it turns out a plus minus the same time. Samsung introduced these restrictions in order to maximize the battery life. But it makes the use of 45 W charging is actually meaningless.

Chinese manufacturers have charged blocks for 40-50 W, moreover, they show battery charge at 4000-5000 mAh for half an hour, charge level changes in front. It looks fantastically! And, of course, it is very convenient.

How much can survive such a smartphone charging and have no consequences? Manufacturers assure that they took care of it. I decided to check it in practice, in December 2019, I began to charge a smartphone every day with a 40 W charger. Three months later and the hundred full cycles were measured by the battery capacity. it decreased by 14% of the nominal. This is a very high result that shows the level of wear. The incomprehensible moment was only that charging time remained unchanged, it was exactly the same as many minutes as before. So when you get so fast charging, yet there are a catch where without him.

In the smartphone settings, as a rule, you can turn off a quick charging, everything depends on your ideas about the beautiful and how the battery will wear. In my opinion, fast charging is what completely changes the idea of ​​the smartphone and how we use it. And having remembered that the battery is consumable, yet you should not turn off such charging.

Battery in the smartphone. myths, misconceptions how to charge and what to do

With a wireless charging, everything is exactly the same, but there due to the physics of the process the heating is the inevitable component. The battery controller regulates charging and speed, so it is physically impossible to spoil your smartphone.

Important! Do not save on accessories for your smartphone. Fast charge of recent generations often requires a cable to 5a, the usual are not suitable. And if the smartphone determines that you use fast charging and simple cable, then the charge rate is automatically reduced. Non-original, left cables and charging can burn the battery controller, which will lead to ignition or even an explosion. In recent years, at least a few people are injured from using non-original accessories, but also there are deaths from shock or explosion of the phone at the head. This is not a joke!

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In the flagships are used not only the batteries of greater capacity, but also special cooling systems (both the processor and the housing as a whole). The better the heat removal system, the longer the battery will last. In low-cost devices, this is what the manufacturer can save, and therefore the battery life in them below, wear from heating above. At the same time, the batteries themselves can be exactly the same.

Lithium-ionic (Li-Ion) batteries.

Interior resistance 300. 600 MOM.
Energy density 6.5 WH
Degree of self-discharge Male neglected (3% per month.)
Nominal number of charge / discharge cycles 1000.
Maximum number of charge / discharge cycles 2000.
Storage life of a new battery About a year.
Service Ladies About one and a half years.

Advantages: high capacity, no memory effect, small size, large amount of charge / discharge cycles.

Disadvantages: high cost, fast aging (after 1.5. 2 years the battery can become unsuitable for use) not depending on the intensity of use, the potential danger when used (the first models of these batteries were often exploded during charging).

General information: The battery must be shipped by 80-90%. The battery may (and should, if not used) to be in a charger considerable time. Recovery data batteries are not subject to restore (do not believe “crafts”).

Specificity of use in a mobile phone: The battery is effective with intensive use of a cell phone. For the period of its service (about a year), it will be optimal in comparison with nickel-based batteries.

Fast Charging Technology

Often from sellers offering to buy a smartphone, you can hear about a certain battery with a quick charging function.

Extremely advanced scare buyers also and impressively sound Qualcomm Quick Charge, and the most mothers add more than the version. 2.0 or 3.0. What kind of miracle batteries are?

In fact, no relation to the type of power supply does not have this technology. It just allows the use of increased current strength, so that charging time is significantly reduced.

Telephone batteries. how to choose

After a while, with a lot of mobile phone, you need to replace the battery.

They work for about two years and should be replaced. Otherwise they will work badly.

This means that you need to recharge it very often. The more you charge the battery, the earlier it will have to be replaced.

Although in any case the time comes when the spare battery becomes necessary. Especially when the phone is a working tool.

First of all, you must think about where you can buy it. It can be done in GSM stores, Internet auctions or virtual stores.

Let’s remember that the choice in the Internet space will allow you to save a few kopecks.

Due to the fact that in stores there are a huge selection of batteries for mobile phones, it is difficult to choose a specific type.

Obviously, he must come to your mobile phone. Most people when choosing a battery look at maximum power and price.

Sorry, but cheap, where manufacturers say they have a large capacity, in fact, this is a hoax.

With a large capacity, for example, 4000 mAh, the quality of manufacture will be very low. In addition, the cheapest batteries for cell phones are often not covered by the manufacturer’s warranty.

Some types of batteries have limited capacity in the case. When choosing a battery capacity for a mobile phone, it is best to be guided by your own common sense.

Full goods above average performance, of course, do not have several. If so, then, most likely, the battery parameters are not compatible with real, so it is better not to be solved to choose such a battery.

Deciding to choose a new battery, you must first of all pay attention to its type. It is better to choose Li-Ion or Li-polymer.

These batteries built on modern materials, which allows you to charge at any time. This means that, no need to wait full discharge, as it was in the case of older types.

Secondly, an important parameter is the battery capacity. It can be about 1500-1800 mAh, while with the capacity of lithium-polymeric batteries above, about 2500 mAh.

It is also indicative of which company produced a battery. In stores there are a very wide selection of manufacturers and brands, which greatly complicates their purchase.

After a detailed analysis of the market, it turned out that only a few manufacturers can offer us reliable, good quality goods.

An important parameter is charging. The manufacturer indicates, for example, that the battery will work flawlessly up to 1000 charges.

Of course, you must use the appropriate power source for charging. At the beginning it is necessary to charge the battery for full, or even continuously for 20 hours.

Then charge the battery discharged. This procedure must be repeated at least 2 times, since in this case the battery will be formatted.

You must always use the corresponding charger. You must look at the charger and best so that it does not take more than two hours.

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Lithium-ion batteries have an automatic charging interrupt system when the battery is fully charged.

You must charge the battery using only original charging devices. others can damage the electronics contained in the mobile phone.

If you buy a battery produced by an independent manufacturer, then must check whether it is equipped with a protection circuit, a thermostat and a case resistant to cracking.

Basic recommendations for selection

What it is and with what it eats

An external battery is a universal device consisting of blocks of batteries enclosed in a compact housing with a USB output and often additionally equipped with specific connectors, charge / discharge indicators and other possibilities that expand the scope of Power Bank.

Regardless of the number of ports, the containers of the “bank” and other characteristics, its purpose is to charge other devices, such as smartphones, tablets, e-books, and even laptops, as well as power supply electrical devices, USB fans, etc. External batteries are convenient for portability and can be used everywhere where there is no possibility to charge from the outlet, so very valued by active users who lack the charge of the built-in mobile device battery and those who are often on trips. Even more convenient to the device that also support the option of wireless charging.

There are a lot of models with different characteristics on the market, so the inexperienced user is asked how to choose the external battery for the smartphone and what moments consider, making a purchase.

What battery is better for the smartphone. the main selection parameters

In modern smartphones, 2 main types of batteries are used:

    Li-Ion (lithium-ion). Comparatively inexpensive, have a higher capacity, in comparison with Ni-MH (used in old push-button phones). Calculated about 300 charge / discharge cycles, after which they begin to actively lose the container.

Naturally, a more preferred option is LI-POL. But not for all models of smartphones they are produced.

The second important parameter is the voltage. Most batteries for phones operating voltage is 4.2 volts. But some manufacturers are now actively moving to standard 4.35 V. The differences between them are as follows:

Batteries themselves are interchangeable. That is, if the battery is 4.35 in install in a smartphone, designed to work with 4.2 V, it turns on it normally, it will not burn anything in it. However, when the mark is reached in 3V, the phone simply turns off. Although the system will indicate that there is still a charge (approximately 20-30%). And the disconnection occurs due to the fact that the protection of the built-in power controller is triggered. She simply does not allow the device to discharge or charge the battery to the “non-working” values ​​for her voltage.

Similarly, if the battery is 4.2 in the smartphone at 4.35 V, the gadget will not be able to charge it above the installed 4.2 V. Therefore, it is necessary to take into account the tension! And to find out how voltage from the battery current in the smartphone, you can use the following ways:

  • View the specification on the battery itself.
  • Explore the instructions for the phone. In some of them, these parameters are also indicated.
  • Contact the manufacturer of a smartphone and clarify information from him.

The third parameter is the capacity. Points to Mah. For each model, the value is selected individually. In most modern smartphones, the average capacity of the battery is from 3000 to 4000 Mah. And you need to understand that this value is tightly tied to the physical dimensions of the battery. That is, if the manufacturer initially installed the battery for 3000 mAh, then there cannot be options with a capacity of 4000 mAh and more (while maintaining initial dimensions). Accordingly, the optimal container for the purchased battery that was in the original battery.

And the last parameter is a si-dimension and connection option. It will not be possible to put an AKB from some Samsung and to the Xiaomi phone. Although they are both Li-ion or Li-Pol, but they have different dimensions, and they are also connected to the same loops. That is, you need to choose the battery specifically for a specific phone model.

In the article, we considered the key principles of optimal choice so that the purchase would be a reliable investment in the appropriate and durable work. But for this you need to remember not only about a suitable choice, but also about the principles of operation. For charge it is necessary to work only with original chargers to prevent possible damage to the electronics of your smartphone.