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What is mAh: Everything you need to know about mobile batteries

A battery is one of the most important elements of any mobile device, without which it simply will not work.

For many users, the principles of lithium-ion batteries still remain covered with a veil of secrecy. And so much so that they would be completely satisfied with the answer in the style of "the whole thing in the magic crystals."

To understand the basic principles of mobile batteries, it is not necessary to study basic chemistry for several years. But if you want to approach the purchase of a smartphone as responsibly as possible, then it would not be superfluous to understand at least the basic terminology.


What is mAh and why is the letter “A” capitalized?

Designation mAh really looks unusual. The letter “A” is written with a capital letter because according to the international system of units “Amper” is always denoted with a capital “A”. The term mAh is short for milliamp hour. This unit of measurement of electric charge is used to determine the capacity of a battery. And mAh is used when working with mobile batteries. If we talk about larger batteries (for example, car batteries), the term “ampere hour” or “Ah” is used there, 1 Ah = 1000 mAh.

The mAh unit is calculated by multiplying the battery life by ampere charge current. In fact, everything is not as difficult as it seems. For example, if you have a battery, but you do not know its capacity, then all you need to do is connect it to a 1000 mAh charge consumer and see how long it will last. If the battery runs out after an hour, then its capacity is 1000 mAh, if after 7.5 hours, then you have a battery with a capacity of 7500 mAh.

Of course, in practice things are not so smooth and in reality the discharge rate will depend not only on the device, but also on the user. Do not forget about resource-intensive applications that can spend the battery faster than others. Therefore, the mAh parameter gives a good idea of ​​how long an average battery will last. However, this figure does not tell the whole story. That is why before buying a smartphone you should read the reviews and check what other users are writing.

Battery life is inversely proportional to how much you will be disappointed with your brand new smartphone or tablet. “Too quickly discharged” - this complaint can be seen in the comments and reviews of almost all modern mobile devices. If you need a good phone that you can safely use during the day, be sure to pay attention to its battery capacity, which is measured in mAh.

Can I replace the battery?

Even ten years ago, the old battery could be replaced with a new one without any problems. But today it is much more difficult to find an Android device with a replaceable battery. Moreover, almost all manufacturers of mobile devices make them non-removable.

The main problem is the so-called “arms race”. Lithium-ion batteries began to actively spread in the early nineties. Since then, thanks to technical progress, their maximum possible capacity has tripled. Impressive, isn't it? As for the dimensions, at the moment the size of a modern lithium-ion battery is only one third of its older brother from the nineties.

Another problem is that processors continue to continuously increase performance. In the first place - by increasing the number of main elements (transistors). Since the nineties, their number has increased 100 times.

This means that a modern smartphone can freely use virtual reality technology and reproduce complex 3D graphics on a smart screen, while working from a battery of the nineties. The processor power is so far ahead of the capabilities of the batteries that manufacturers have to seriously think about fitting a battery inside the case that would be enough for at least a day of active use. In addition, consumers need the most thin devices, and a huge battery only increases the size of the smartphone.

Put yourself in the shoes of the manufacturer. To make the battery removable, it must be placed in a special bulky case so that any user can safely handle it. All this does not prolong the battery life of the device, but merely wastes precious free space. But it is the dimensions of smartphones that are of paramount importance. That is why manufacturers prefer to make them non-removable.

Will the situation change in the future?

I would like to believe that the situation will change a lot over time. Technology does not stand still, almost every day the speed of data transmission, the productive capacity of processors, the quality of photos and videos increases. Now on smartphones, you can record high-definition video and run complex resource-intensive applications. But as for progress in the field of lithium-ion batteries, then everything is not so simple.

Some researchers are trying to find alternative materials that could completely replace lithium-ion batteries, while others are trying to find other ways to solve problems that could greatly reduce the size of batteries.

For example, they are actively studying the work of Li-imide batteries that use an electrolyte that prevents the formation of hydrofluoric acid. As a result, the overall battery life increases, much less heat is generated, and most importantly, battery swelling is reduced.

Everything is correct, during the life the charging ability of any battery decreases. In addition, manufacturers are forced to create special cavities inside their devices so that in future the battery can fill this free space.

As we mentioned earlier, today the dimensions of mobile devices are crucial. Therefore, if you know how to make a battery, which over time will not so much increase in size, then precious millimeters can be used to increase the battery capacity, and hence the battery life of the device.

Therefore, apparently, in the near future the situation is unlikely to change. The only exception is a sharp technological leap. If you do not release the smartphone from the hands, then perhaps you should abandon the thin flagship and pay attention to a more bulky device with a large battery capacity.

Possible solutions to the problem

Although the physical size of the battery is still severely limited for the reasons described above, you can still extend the battery life a little. Unfortunately, we cannot advise you to switch to a smartphone with a removable battery, because nowadays they are practically not released, and you can find only a couple of decent models on the mobile device market.

Alternatively, you can purchase a smartphone or tablet that supports fast charging technology. It has almost all modern Android devices, and this applies not only to the flagships, but also to relatively low-end devices.

Of course, this does not solve the problem with the battery life, but you will agree that it is much easier to quickly recharge a smartphone with a small battery and immediately return to work than to spend long hours recharging a powerful battery.

In addition, you can carry a portable charger with you. Then you can always “revive” a discharged smartphone or tablet, if there are no other power sources nearby.

Source: www.androidauthority.com