How to choose the battery for a cell phone

When choosing a battery for your cell phone is first of all to determine its compatibility with the device.


  1. The main selection criteria
  2. How to choose an external battery for your phone
  3. The best battery manufacturers for phones

How to choose a battery for a cell phone: what to look for

The main criteria for choosing a battery for your cell phone are:

  1. Compatibility with the phone being used;
  2. Capacity.
  3. Also note that the battery can be internal and external. Batteries of the latter type, the so-called “power banks”, are not installed in the phone case and are designed to be used as a portable charger.
  4. The manufacturer of the battery is also important.

Main criteria of choice

The most important parameters for choosing areType, compatibility and capacity.

Type of battery

The type of batteries are differentiated into internal and external (portable).

Internal batteries

internal batteries

The internal battery is a vital functional element of the phone. All other microcircuits are powered by it. In fact, no cell phone can function without an internal battery installed.

Internal batteries are always included with the cell phone. They have a long operating period, so that they will have to be replaced either in case of damage (e.g., due to drowning or bloating), or after significant wear and tear.

“Symptoms” that signal the need to replace the internal battery are:

  1. Its bloating or any other spontaneous deformation;
  2. Fast discharging of the phone with unexpectedly fast or, on the contrary, slow charge;
  3. The appearance of heat during normal use.

Of course, the long service life is achieved only if the phone is handled properly – it is not left near heating elements, under direct sunlight, not used in conditions of extremely low temperatures or very high humidity.

Internal batteries are usually not cross-compatible. That is, they are designed for use with one particular phone. And such “specialization” is achieved both structurally – the battery has the size, shape and location of the contacts, allowing it to install only in the box of a particular model, and at the electrical level – the current and voltage supply battery is designed for use only in compatible electronics.

As a consequence, trying to install the battery from one phone into the tray of another is not worth – even if it is structurally possible, not the fact that he would not “destroy” the delicate electronics inside the device.

Portable accumulators

Portable batteries

Portable batteries (external, “power banks”) are not an alternative for the internal. The phone will not be able to run on just this type of battery. Portable batteries are designed for “emergency” recharging of the device in conditions of inaccessibility of normal domestic network – in long trips, hiking or a banal power outage.

The principle of an external battery is quite simple. It charges itself first, then stores power for a certain amount of time (usually quite a long time, about several weeks), and charges the phone when it is plugged in.


As mentioned above, different manufacturers of cell phones make devices with different shapes of battery trays and voltampere characteristics of batteries. Therefore it is very important to determine the compatibility.

This is usually found on the battery pack itself. Its technical specifications provide a list of devices to which it will fit.

An alternative is to search for a battery by the specific model of the battery itself. It can be found on the sticker on the battery itself.

Battery capacity

The battery capacity will affect the battery life of the device. So the higher it is the better. But remember that batteries with a very high capacity are usually quite large, and therefore may not fit under the back cover of the device.

The capacity of the new battery should preferably match or slightly exceed the capacity of the battery that you are replacing. This will ensure maximum compatibility.

How to choose an external battery for your phone

How to Choose an External Battery for your Phone

The external battery, aka portable charger, is designed to restore the internal battery of your smartphone. Therefore, the main criterion for choosing is the capacity of this device. Additionally, you can also pay attention to the output current and the case material.

External battery capacity

The higher the capacity of the external battery – the more times it will be able to recharge your phone. However, the peculiarity of cell phones is that they are initially equipped with quite “small” internal batteries. On average, their capacity is about 1000-1500 mAh.

So a really big external battery they just do not need. Even a 5000 mAh budget model will be enough for 2-3 recharges. Buy a more “capacious” battery makes sense only if long trips are planned.

It is worth remembering that the battery capacity indicated on its packaging, slightly different from the real one. This is due to a number of factors, including self-discharge, transfer loss and other purely physical phenomena. Therefore, an external battery designed for 5000 mAh will be enough for 2 charging phone, the built-in battery capacity of which is 1500 mAh.

For urban use and short trips will be sufficient battery capacity of 5000 mAh. For long trips it is desirable to buy models with 10,000 mAh or more.

Charging current

The charging current determines the speed at which you can recharge your phone. The higher it is, the faster the internal battery of the device will restore its reserve.

But there are a few “buts” here as well. Older cell phones are not designed for high charging current – when powered more than 1 A, they can simply burn out. In addition, such a high current could damage the internal battery.

Therefore, for use specifically with cell phones, it is advisable to buy external batteries, designed for 1A or even less. Of course, in this case, a full charge will take quite a long time (up to several hours), but the risk of damage will be minimal.

New cell phones (such as those released by Nokia in 2016-2017) can handle high charging currents. For them, you can buy a powerbank designed for 2.1 a.

Case material

The material of the case determines some of the practical and operational properties of the powerbank. Usually such devices are made in metal or plastic.

  1. Plastic is a cheap and quite practical material. However, it is not scratch resistant and can be damaged if dropped. Therefore, it is advisable to use plastic power banks very carefully.
  2. Metal is more expensive, but also more stable. It does not scratch or crack. The disadvantage of metal is its thermal properties. It freezes quickly and leads to intense self-discharge of built-in batteries in the cold. Therefore, metal external batteries are not suitable for use in low temperatures.

The Best Battery Manufacturers for Phones

Among the manufacturers of the best quality internal batteries for phones are the following companies:

  1. Craftmann;
  2. TF1 (TelForceOne);
  3. artner.

Of course, the best internal batteries are original, that is, produced by the same company that made the phone.

Among the manufacturers of external batteries can be distinguished:

  1. Inter-Step;
  2. Xiaomi;
  3. Hiper.
  4. Canyon products are also suitable for modern phones.

In the following articles our experts tell you how to choose a case for your smartphone and the secrets of choosing a protective glass for your smartphone.

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