Battery : A battery is a back up reserve of energy that can power a car. Auto batteries are 12 volts and are used for the car’s light system, starting system and all other electrical systems on a car. The car battery is uses the sulfuric acid to react with the oxide plates to help store and regenerate power. Other types of auto batteries are the hybrid battery which are found only on hybrid vehicles. Hybrid batteries can pack around 200 volts or more and must be handled with extreme care. The hybrid battery is capable of starting and propelling the car. The electric car uses a lithium-ion battery charged by 120 – 240 VAC using a SAE J1772 compliant electrical cord.