[coolhandcountry]

Well for me metal man a 4000 mah pack at 15c I am not sure I would run on a speed run with a xl motor for the fact is they can suck some serious amps. The 20 c would hold a higher voltage as well to. Yes I do like a good runtime. I am also a fan of going fast. Now if you talking a 6000mah pack with a 15 c rating I would say yeah.