2nd cell mod
 

well whod uh thunk it its really easy just grab you and old bit battery sodder the negative end to the positive end ont the car and the positive end of the battery to the negative end on the car it fits unmder a mercedes body i really donno bout any others due to the fact i do not have anybut remember charge it twice be for u run it ... some one said something about wheeles yell heck yah you can do em with this mod

sounds good keep it up