Ok, Thanks for the info. I break them in at 2 volts but test them at 5. This motor only pulls about 5 amps at 2 volts with the setup I have on it now. I am new to this 4 cell stock pan car thing. We always ran 6 cell pan where I come from. I ran 4 cell 19 for awhile and did very well with that. I have many trophys to prove it. but now the local track is going to 4 cell stock and 4 cell 13.5 brushless. I need to do well to promote battery sales but so far that's not going so well and I have to much money invested in to brushed motor equipment to go to the brushless stuff just yet. so any advise you guys have I will gladly take. Thanks, AL