Well I just tried to see if I can find out which battery controls the steering servo by just connecting one battery and I got weird results. If I just try one battery then the light never comes on. If I plug in both batterys then turn on the truck the light comes on and if I disconnect one battery the light goes off right away and the steering servo does not work. When tried unplugging the other battery the light stays on for a few seconds and the steering servo works. What do you think?? There has to be a way of doing this. The EVX-2 comes with the E-Revo brushed version and I know people have used Lipos with that truck.