The car battery light doesn’t actually warn you that your car battery is low on power. It is actually warning you you that your vehicle is running on the car battery’s power alone because there is a problem with the alternator, which is the vehicle’s charging system. When this happens, your car battery’s charge is being severely drained of power. Continuing to drive will end in a breakdown and can even cause other damage to the car’s electrical system. You should have your car checked by your mechanic as soon as possible.