If I understand things right a 3800 MaH 25C lipo would be ok ??? I ask because I'm trying to use as much of Bill D's stuff as i can. If that lipo is ok now all I need to do is get the battery a 21.5 and the GFX converted. All that while worrying about my job and the economy. Now if myself and the other 2 drivers on the team all get the right stuff we want to make the trip for the saturday races and what ever "big" races might happen up there.