My daughter has a 07 Accent with about 20K miles. Recently it has started acting like the battery is dead and will not start. It will jump with jumper cables. This has happened about 10 times in the last 3 weeks. I had her take it to the local autoparts store and they've tested it twice, they say the battery and alternator is fine, they suspect the starter. Well, I finally got an appointment with the dealer and they can't find a thing wrong with it! This is an intermitant problem, sometimes it will start fine for a couple of days then shows up again. Is there any known problems like this? If it is a starter why would jumping it off work?

 

Sounds like a voltage leak. Check for the trunk light or glove box light going off. Did you try to charge the battery manually?

 

I thought about that but it can happen 3 minutes after turning off the car, even with the headlights on you can't kill the battery that fast.