Battery Charger Work?
A battery works by having two or more metallic plates immersed or surrounded by a material called an electrolyte. The electrolyte in an automotive battery is sulfuric acid. As a battery discharges, this acid combines with the metal (in the case of automotive batteries, lead) plates to create lead sulfate crystals. As these crystals accumulate on the metal plates, the voltage the battery is capable of outputting reduces. A battery charger applies direct current (DC) electrical energy to the metal plates, which prevents lead sulfate crystal build-up.