How to choose a charger for battery

Even the highest quality battery tends to discharge with improper use. To replenish its charge, you can use the services of a neighbor and simply “light” him, entrusting subsequent charging to the generator, and you can remove the battery and connect its charger, set the required value current and replenish the charge with it. Everything, that required in the second case – to have a compact charger on hand device for the battery.

How to choose a charger for the battery


We recommend reading an article from an expert on choosing the best battery for cars.

Top Charger Manufacturers

Modern car battery chargers are high-tech devices to control generated current up to several milliamps, providing the finest charge. The best are models from famous automotive electronics manufacturers:

  1. Varta;

  2. Bosch;

  3. Delphi;

  4. Htachi;

  5. Mitsubishi

  6. Topla

When choosing a battery charger, you must focus not only on TTX devices and parameters installed battery on a car, but also on reviews users highlighting the strengths and weaknesses of a particular models. Finding such information is easiest on the Internet, by asking the appropriate search query, as well as in various public social networks and thematic automotive forums.

Types of car chargers

Modern car chargers are classified by different, however, the most correct is the division into species in depending on the functionality of the device, as well as the principle of his work.

Battery Chargers

Transformer chargers

Transformer Charging

Time-tested models that were widely used in last century. They are based on a step-down transformer, on the primary winding of which is supplied 220 volts, and with a secondary removed 12 volts. Suitable for charging a wide variety of batteries rated for on-board voltage 12 Volt.


  • Inexpensive

  • A wide range of compatible batteries;

  • Unpretentious in care and maintenance;

  • Simple construction;


  • Very heavy;

  • Not suitable for modern microcontroller batteries charge;

  • No fine adjustment of the degree of charge;

  • Large dimensions;

Impulse chargers

Pulse chargers

The modern type of devices based on semiconductor processing circuit of the incoming current. The microcontroller installed in the case allows you to accurately adjust the output current and change its strength with an error up to up to 0.1 Amperes, which is important for “resuscitation” of fully discharged batteries.


  • Compact and miniature;

  • Convenient and easy to operate;

  • Wide range of adjustment of the output current;

  • Suitable for the most advanced batteries;


  • Expensive;

According to the principle of operation, all devices of this class are divided into two categories:

  1. Chargers – traditional chargers that allow generate current of the same frequency and power. Intended for slow and monotonous replenishment of the battery capacity. The disadvantage is often a long charge, which can take 10-12 hours;

  2. Launchers in this regard look much better. They allow not only to generate uniform current for charging battery, but also give a short-term high frequencies allowing you to start the car even in the most adverse conditions. The disadvantage of such a device is call the relative high cost.

Charger selection options

Choosing the right type of device according to the battery installed in the car must be turned attention to its key features that have the most direct impact on operation.

Battery Charging Principle

  1. DC voltage, AC. Common pattern at which the current supplied by the charger adjusts to degree of charge, decreasing to minimum values ​​at the end of charging. This principle is good because the battery practically does not lose capacity over time;

  2. DC current, AC voltage. Intense enough a method that is characterized by fast charging, however capable of cause the battery to age soon. For some models batteries this method is the only possible.

  3. Combined type. The device is equipped with a microcontroller, which allows you to change both the voltage and the power supplied to the process of charging current, adjusting to the state of the battery and choosing an algorithm suitable for charging.

Availability of regulatory equipment

An important criterion that makes fine tuning possible current supplied to the battery terminals. It can be presented in the form induction ammeter with control knob, position change which changes the position of the arrow of the device. Most advanced are digital devices that control the applied current with error up to 0.1 Ampere. The maximum output current should range from 8 to 15 amperes, thereby allowing work with a wide variety of batteries regardless the voltage and current generated by them.

Useful is the adjustment of the output voltage. Universal are considered models that give the ability to set voltage in the range from 6 to 24 volts – just such a current required in order to be able to charge everything without exceptions modern battery.

Desulfation mode

In specific operating conditions, as well as with prolonged simple, sulfate formation is possible on battery plates, which lead to a significant, up to 60-70 percent, decrease battery capacity. This mode makes it possible to neutralize sulphates formed, and also produces initially charging by microcurrents capable of restoring battery capacity.

Test equipment

Special microcontroller, allows for connection to terminals Battery measure residual battery capacity, output voltage and current as well as electrolyte density, thus allowing assess the overall condition of the battery and take appropriate measures for his “resuscitation”.

Features of choosing a charger for a car battery

Given the many features of modern models batteries, as well as a large number of electronic components, which are energy consumers in modern cars, Charger selection should be given particular attention. Saving on a device is not worth it, it’s better to give a choice in favor device that:

  1. It can not only charge the battery, but also generate short-term impulse to start the car;

  2. Has a range of output voltages from 6 to 24 volts and power current in 0 to 15 amperes;

  3. Equipped with a microcontroller for flexible configuration output current depending on technical features specific battery;

  4. Has a battery tester that allows you to conduct a primary diagnostics;

  5. Equipped with a desulfurization mode;

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

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