You may need a new alternator. If it is not charging the battery that also will show the battery light. Most shops and auto parts stores will be able to test it without removing it from the car.
Oct 28, 2008 at 9:32 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.