So yesterday I was driving my Mustang around with the speed pinon and the series connector, and jumped/crashed it pretty hard into a wall... It broke the front bulkhead... oops, anyways I stopped to check out the damage and when I started driving again the car was going much slower than before I stopped. I didn't really think too much about it, I just thought the batteries were getting low, but when I took the batteries out I noticed one of the cells had gotten very hot and melted the casing off around that one cell. I checked the voltage and found it to be 6.39v. The other battery was still at 7.79v. I think I lost a cell in the "hot" battery and I am wondering if anyone else has had a problem like this? Also what are some good aftermarket Nimh batteries that you guys have found.