Hey, I was wondering if your car is over geared and you run the battery on it and it gets hot will the battery be useless after you recharge it. I think that is what was wrong with my car. I think it was over geared and the battery got hot. And after it cooled I recharged it and tried to go again and it seemed like the battery was useless. It is a NiCd battery. I got it used so it could just be old and worn out. Thanks a lot. Justin