Car batteries are an important component of any vehicle. Even though engines are the powerhouse of any car or truck, without a battery, the engine wouldnÕt be able to work. According to Firestone Complete Auto Care, car batteries work by providing a jolt of electricity necessary to power all the electrical components of the vehicle. This is achieved through a chemical reaction that changes chemical energy into the electrical energy needed to deliver voltage to the starter. In addition to initially starting the car, the battery also keeps electric current steady to keep the engine running.
The battery also works in conjunction with the alternator to power the electronics in the car, according to the automotive information blog Autosessive. While the car is running, the alternator reverses the current produced by the battery, recharging it as a result. This happens during long journeys, so people who drive for short bursts of time may find that their batteries will not have a chance to recharge and may not have the longevity desired.