Your cheapest bet would be turnigy or zippy maybe from hobbyking but i would look into a spc or smc they seem to be alot stronger on the punch then most. I ran 2 venom 30c 5000mah in my e savage but the problem was i had the vertical towers which made it a bitch to clear the rear tires with the kershaw battery trays. I made it work and they were good batteries with really good warranty. I know they make non vertical batteries as well check out there website also.