How to choose a charger for phone

When choosing a charger, you should pay attention first turn on the electrical characteristics of the power supply.

choose a charge for the phone

How to choose a charger for your phone: what to look for Attention

The main criteria when choosing a charger are:

  1. Type (standard adapter or external power bank);

  2. Electrical specifications (voltage, charging current, power);

  3. Support for fast charging technologies (Quick Charge, Fast Charge etc.);

  4. The number of connectors for the cable and the voltage of each of them.

  5. Charger manufacturer is also important. devices.

Types of Chargers

Structurally and by the principle of work, chargers They are divided into two types – the adapters themselves, they are also blocks nutrition; and external chargers, better known under power bank name.

Adapters or Power Supplies

Adapters are structurally conventional electrical converters that rectify and reduce voltage. Such devices are intended for charging a phone or smartphone from a household network. According to the results of the conversion, alternating current with voltage of 220 V and a power of 5-6 A “turns” into a constant, whose the parameters are 5-18 V and 0.5-2.1 A, depending on characteristics and purpose of the adapter.

Adapters are made in the form of small blocks that installed in a household outlet. A cable is connected to them power supply by which the converted electric current and “Goes” to the smartphone.

Structurally, the adapters are divided into household, designed for installation in a conventional outlet, and car powered by cigarette lighter or corresponding socket. Despite the similar working principle, they are not interchangeable.

The main criteria for choosing an adapter are the parameters input voltage, output voltage, current and support fast charging technology.

Separately, it is worth mentioning another variety of blocks Power – Wireless Chargers. Such devices recharge a smartphone that comes in contact with them. Of course, in the smartphone itself must be implemented wireless charging.

External batteries or power banks

External batteries, which may also be called portable chargers, power banks, etc., have the same operational purpose as the power supplies – they used to charge the smartphone. However the working principles of these devices are fundamentally different.

Powerbank is structurally an increased battery capacities. It is supplemented by various functional elements – charge controller, LED indicators, power connectors, buttons, etc. The principle of powerbank is as follows:

  1. First, the external battery is charged from the power source. (for example, from an adapter or computer via a USB cable);

  2. Then he for some time “holds” the accumulated energy

  3. When connecting a smartphone, the power bank gives up the accumulated energy to attached device.

In fact, the power bank is designed for emergency recharging smartphone in conditions when it is impossible to reach the outlet or not for this time – on trips, for example.

When choosing a power bank, it is worth starting from the following criteria: capacity, charge current, case material, support fast charging technology.

Main selection criteria

Criterias of choice

When choosing a charger, you should pay attention to following parameters:

  1. Input current and socket standard (especially important when ordering in foreign online stores);

  2. Charge current;

  3. Charge voltage;

  4. Support for fast charging technology.

All these parameters determine the compatibility of the charger. and a smartphone.

Input current and socket standard

In Russian household electrical networks, current with voltage 220 V, power 5-6 A (however, when connected high-power equipment like kitchen appliances this parameter significantly increases up to 18-19 A) and a frequency of 50-60 Hz. These parameters should be supported by the charger device.

At the same time, in the USA household networks are used in which voltage is 110 V. The adapter is designed for applications in America, in the Russian “outlet” may just burn out.

As a result, when ordering a charger in any online stores should first of all pay attention to supported input voltage. Some adapters may work in any networks.

It is also worth considering that sockets in various countries also vary. In Russia, type C connectors are used. In “ours” sockets can be installed plugs types Europlug, Schuko, CEE 7/7, CEE 7/16 or CEE 7/17.

But types A and B (NEMA standards) used in the territory USA and Canada, not suitable for use with Russian outlets without appropriate adapters.

Charge current

The speed actually depends on the charge current smartphone charge. The higher it is, the faster the device will recover stock of energy in the battery. At the same time, it’s worth remembering that older smartphones are simply not designed for high charge currents.

But a low charge current can lead to the fact that the smartphone does not will be charged at all – it will simply be discharged even when connected to network. The standards for this parameter are:

  1. 500 mA (0.5 A). Suitable for use with mobile phones or very old smartphones. This charging current is not able to cover the “fixed costs” of modern high-power a mobile device, but necessary and sufficient for devices, issued, for example, until 2010-2011;

  2. 750 mA (0.75 A). It is very rare. Scope of application similar to charges rated at 0.5 A;

  3. 1000 mA (1 A). Most common now current standard in chargers. Versatile enough suitable for use with most mobile devices – from mobile phones or portable players to smartphones budget or middle price segments;

  4. 2000-21000 mA (2-2.1 A). Applies to demanding devices – for example, tablets or flagship smartphones with a high screen permissions and performance processor. May be dangerous for old devices. Provides high speed charging and stable power even when the connected devices.

It is advisable to use power supplies that have the same power. current, as well as complete to the smartphone. It really isn’t applies to adapters that support fast charging.

It is worth remembering that manufacturers of budget power supplies often intentionally overstate the output current. For example, a device that is marked as 1 A can actually issue 0.5 A. Therefore, the quality of the power supply is also very important.

Charge voltage

Almost all modern smartphones, unless otherwise indicated, are designed to be powered by a charge current of 5 V. This The standard is used, for example, in the USB ports of a computer. how consequence, for the compatibility of the smartphone with a PC, it must receive 5 volt current.

Therefore, you definitely should not purchase chargers or power supplies that have a supply voltage greater or less than 5 Volt. Such accessories may well “burn” delicate electronics inside the smartphone or damage the built-in battery.

Similarly, this rule does not apply to adapters that support one or another fast charging technology.

Support fast charge technology

Support for fast charging technology

From 2014-2015, many manufacturers began to introduce technology fast charge. With such a connection, the power supply produces high current and voltage values ​​in order to make it even faster restore battery capacity in a smartphone. Specific value of these electrical parameters is determined by the manufacturer and fast charging technology standard, but generally up to 5 A and up to 20 V, respectively.

Fast charging technology implemented at low software and hardware level and involves the exchange between a smartphone and a power supply not only with electricity, but also with information. For example, the power controller in the smartphone sends a “command” to the block power supply to increase current and voltage, and that, respectively, performs. Or not, if it does not support fast technology charging.

It is clear that if connected to a power supply with support technology for fast charging a smartphone in which it is not implemented, the latter will receive less current.

However, fast charging standards vary. The following are distinguished:

  1. Quick Charge Standard developed by Qualcomm and supported only by a limited number of SoC processors from this manufacturer;

  2. Pump Express. A standard developed by MediaTek. Like Quick Charge, only limited supported number of SoC processors from this manufacturer (installed to most Chinese flagship smartphones);

  3. TurboPower Lenovo developed the standard specifically for some Motorola smartphones;

  4. Adaptive Fast Charging. Company standard charging from the company Samsung Applied since 2015 in flagship smartphones and “middle-middle” price segments – in the S, Note, A and some others;

  5. VOOC Fast Charging – developed by BBK specifically for smartphones OPPO;

  6. Dash Charge – developed by OnePlus for branded smartphones;

  7. Super Charge – Huawei standard;

  8. Super mCharge is Meizu standard.

Standards in most cases are not cross-compatible. Therefore, if the smartphone supports Samsung Fast fast charging technology Charging, you should buy a power supply for it, equipped with support for the same technology. But the Quick Charge adapter will be “issue” unless the standard 5V / 2A.

How to choose an external charger

choose an external charger

When choosing a power bank, you should pay attention to three parameter:

  1. Capacity;

  2. Charge current;

  3. Body material.

But the first two are most important.


The higher the capacity of a power bank – the more times it is capable of recharge a dead smartphone. However, the actual significance of this The number is determined by the battery capacity of the smartphone.

For example, if your smartphone is equipped with a 3000 battery mAh:

  1. Powerbank at 5000 mAh will recharge it 1 time;

  2. Powerbank at 10,000 mAh will recharge it 2-2.5 times;

  3. Powerbank at 20,000 mAh will recharge it 5-6 times.

However, the exact number depends on a number of other parameters, among which charge current, resistance of the connected cable, weather for window, the time elapsed since charging and many others. therefore do not hope that, for example, a 5000 mAh power bank can Recharge your smartphone with a 2500 mAh battery twice.

Charge current

Choosing the value of the charge current is based on the same parameters, as for ordinary network adapters (power supplies). Given that the stability of the current in power banks is not too high, it costs choose deliberately high parameters:

  1. For mobile phones, old smartphones, players, smart watches, wireless headphones, and other gadgets that don’t consume high power during operation – 1 A;

  2. For modern smartphones, tablets, low-power laptops – 2-2.5 A.

There are several powerbank models that support fast charging technology. As a result, it is worth considering the compatibility of the charger and the smartphone with which it planned to use.

However, power banks that support technology fast charging, not recommended for purchase. Built in them Batteries usually do not survive squeezing 20 V / 5 A. Therefore, the battery capacity drops, and after a few months will have to change the power bank.

Body material

Strength, durability and some operational characteristics of a power bank. Such devices can be made of plastic, metal, as well as complemented by rubberized inserts.

  1. Plastic is a simple, inexpensive, but fairly reliable material. Power banks with such a case are cheaper than metal, but with this is badly experienced falling to the floor. However, plastic has an important advantage – external chargers made in such a material is better at experiencing temperature changes in the cold season.

  2. Metal better survives any falls and other mechanical exposure. However, power banks in such cases are slightly more expensive. Besides Moreover, due to the fact that the metal “accumulates” low temperatures, the cold season, such devices self-discharge faster.

Additional inserts – for example, rubber – either protect powerbank from shock, or just make it more beautiful.

Top manufacturers

The best manufacturers of power adapters for smartphones are:

  1. Belkin;

  2. InterStep;

  3. Nobby

  4. Samsung

The best manufacturers of power banks are:

  1. Xiaomi;

  2. InterStep;

  3. Hiper;

  4. Canyon.

In the following articles, our experts tell you how to choose earphones for phone and secrets of choosing a memory card for a smartphone.

Attention! This material is subjective opinion of the authors of the project and is not a buying guide.

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