Chargers are used after a car battery
has lost some or all of its charge and is said to have gone flat. The charger connects to the carís battery by means of crocodile clips, and sends an electrical current to the carís battery. If you need to use a car battery charger, you must make sure that you carefully follow the instructions for operating the charger.
For a battery to charge properly, itís very important that the battery fluid level is above the lead plates inside the battery. The charger will usually have two cables, these are normally red for the positive cable and black for the negative cable. The negative cable from the charger should be attached to the negative terminal on the carís battery and the positive cable coming from the charger should be attached to the positive terminal on the car battery
Some chargers require connection to a mains electrical power supply while the charging is in progress. Other chargers are rechargeable, and donít need a power supply. They can be used to charge a car battery anywhere and are easily carried in the car for use when required.
Also there is a green product ó solar-powered car battery chargers
. These chargers simply plug into the 12 volt socket outlet in the interior of the car. They can charge the car battery at a low amp rate and can take a relatively long time to fully charge the car battery. These solar chargers are quite cheap and there is obviously no need for a mains power supply.
You need to know some important safety matters when you are using car batteries
and chargers. If you are checking the electrolyte liquid level inside the battery, avoid getting the liquid in your eyes, or splashing onto the skin.
The liquid contains acid which can burn your skin and can even cause damage to your sight. Be sure to wear proper safety goggles or other adequate eye protection and you should wear protective gloves to avoid skin burns. Itís also important that when you work on the car battery
and you are charging it, that you must avoid smoking. Gas emitted by the battery while it is charging may explode and cause injury or damage to the surrounding area.
Article from http://www.ixbay.com