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Hello, my name is Bobby. Thank you for the question. Can you tell me if you have a voltage meter to run you through some tests? If the battery light is on when the engine is running then chances are you have an alternator that is failing.
Thanks for the response. If the car is starting fine then the battery should be just fine. The battery light coming on when the engine is running indicates a bad alternator. I would always check the battery connections first. If those are clean and tight then it is probably the alternator.