[dustn]

are you guys forgetting about the layman's mod? you can stack 3 of those in the stock batt location, and they are rechargeable. The prob with the batteries you have is that they do not provide much current. NiCd do provide a lot of current, followed by NiMH... Alkaline and the like have a lot of internal resistance, so they are not as good either. If you want a "short burst of speed" try capacitors with low voltage and high farrads.