Freddi, if you are still using the stock battery, then I'd get a new one anyway. What kind of run time are you getting out of it? Of the three tanks I've bought, two stock batteries wouldn't even take a charge, and the one in the Bulldog I got my nephew dies after maybe 15 minutes. I'm using the Trinity Reference 3000 mAh and get tired of driving it before the battery runs down. Well over an hour run time, and that is with metal gears & tracks, Creeping Death turret with the black light for the tracer system on, headlights, and a 5v Novak fan running cooling the board. I love the Trinity battery. They are a lot smaller than the stock battery [length and width so there's room for the wires and connectors in the battery box], and you can get the 3000 mAh on eBay for around $25 - Tower Hobbies [a sponsor of this site] has them too.

http://www3.towerhobbies.com/cgi-bin...nity+reference