Thanks MKL, my ultimate intended use is outdoor racing, indoor when I can. Run times, not sure, but I have alot of practice to put in. I know I need 4S, but the "C" rating confuses me. I know I need a min C rating of 40 but is higher better? And whats too high? I guess what I need is a good starting point on batteries. And the Tekno eb48.2 will propably be my buggy choice.