True R/C Lipo
I have a 2s (2 cell 7.4v) 4000 mah lipo pack from Truerc.com. It has been working perfectly for 3 months now without a problem! It's important to check out if it's 10c or 15c before purchasing. (ie. the first 7.4v 4000mah 2s is only 10c for $40 but for $50 you get 15c). It also doesn't hurt calling him to ask questions about size, fit, etc. I've also had perfect experience with my 3s lipo 4000 from Maxamps.com. Personally, I like the smaller capacity for racing because it's litterally half the weight of a 6 cell nimh.... but you can always go bigger for more run time.
Hope it was helpful
"Lipo Power all the way!"
Duratrax DX450, Losi 8ight Truggy, Team Assoc. FT T4 / LRP, Mid-Engine Rustler/ Slash w/ Velineon system, Losi XXX-cr,...and more :) , maxamps lipos, truerc lipos