We've been flying ours on a 3 cell 710 mAh lipo pack a lot recently and wow is that sweet. Already burned up one motor although we've put a LOT of time on it over the past month. It is very common for the can motors to wear out after many hours of use. That's why GWS and all the others sell replacement motors. It's just a 300 size can motor. We replace with a spare we had laying around and back in the air. My son Forrest is flying the Tornado pretty much everyday before school now either in the driveway or garage.