An illuminated battery light means there’s something wrong with the car’s charging system, which primarily consists of the battery and alternator, along with some associated components.

Every car has a red “alternator” or car battery symbol in the instrument panel that illuminates when the ignition is switched on. Once the engine starts, the light should go off, indicating a ...

Shopping for a car battery? Read about types, features, and other must-know topics in our car battery buying guide to make an informed choice.