I was running my rustler yesterday.I was running the stock battery and I think a cell went bad.That one cell was really hot and split the shrink wrap and also melted the wrapping on that cell right to the cell itself.My question is can I replace that cell and would it be worth it. Or should I just strip the battery of the parts. The battery is about a year old. I also noticed that this pack in the last couple of runs before this happened.That it would start off slugish in speed and power and then it would pick up in speed and power a few minutes in a run.