going get the lipo batterys get the power pumping out and then you will see the differents with nimh battery. i use lipo all the time 7.4v and 11.1v but you carnt race with a 11.1v lipo. battery nimh battery are not there good in brushless sytem .that what i think i used nimh battery before i got lip[o battery but my trucks is traxxas rustler vxl well fast i tryed with 7.2v and 8.4v and 9.6v and 10.8v nimh battery it should be hit about 65mph with this battery but i take 5 mins to get the power to get the speed up my opinion is that i would never buy a nimh battery again waste ov money i got two new battery for xmas 1 that a 10.8v battery and 1 that 9.6v battery so you can say that get 200 charger out ov nimh battery what a load ov shit the 10.8v battery green cell s are shit but my 9,6v battery work ok ish but the 10.8v take about 5 /10 mins for the power to kick out then it work. but that should be speed with this battery 65mph not nimh battery are crap??????