The battery that starts a vehicle.
During the starting process, a lot of energy has to be supplied quickly. For this purpose, the starter battery supplies power to the starter motor and maintains the supply to all safety-relevant consumers and control elements until the engine starts. Depending on how many consumers are installed in a vehicle, batteries with particularly high cold start currents are used, e.g. AGM batteries. Cars with a start-stop function require batteries that are particularly resistant to cycling. Specially designed AGM or EFB batteries are used here.
In some cars, a backup battery is also installed.