What does the battery indicator light mean in a car?

[OAlejandro]

The battery warning light on a car indicates a fault in the battery system. If the headlights are left on after the car is turned off, this warning light may appear after some time. However, once the car starts and the alternator begins working, the light should turn off. If the warning light remains illuminated after starting the engine, it suggests an issue with the alternator, wiring, or the battery itself. A red warning light typically indicates a serious problem that could affect the car's operation and requires immediate inspection and repair. A yellow indicator light, while less urgent than a red warning, still signals an issue that should be addressed promptly to avoid potential complications.