Rusty that's exactly what he said about the voltage, that it maybe dropping into the 10 volt range, I have to test it out today. I have a 2200mah 25c Thunder Power pack that got pretty hot, maybe I'll try a 2500 or 3000mah 25c next. I am happy with the power of the motor, she flys great at a little less than 3/4 throttle, I just don't like the batteries getting so hot.