Thanks ezveedub. Then I wonder what's causing the motor to stutter and cut out. the brushed didn't do that. I went ahead and ordered a Dynam 30A esc and I'm gonna hope that clears up the problem. the lipo's are practically new, one is a 11.1v 3s 1000 mah 10c and the other is a 11.1v 3s 1250mah 12c. They can't both be damaged. But maybe they are. After I charge them, I check them with a digital voltmeter and they are both over 11.1v. So then a lipo rated at higher mah gives more flight time? thanks for not flaming me cause I think these are dumb questions I'm asking.