Guys my buddy just got one of these 2x4 Traxxas Slash new from the LHS. He paid right around $250.00 brand new. It came with the 7 cell Nimh 3000mah battery. I have 2s batteries that we use in my wife's cousin's Losi xxx-sct. He was wondering if he used one of my Lipo's it will hurt it? He thought about upgrading to a brushless system.... My Lipo's are Venom 2s 1p 5000 mah, 20c