Theyre going to get super hot and the run time will be very short. I wouldnt suggest it but if you have a temp gun and can keep an eye on the battery temps you might get away with it for a short period of time. I've never actually tried it but I'm pretty sure youd end up ruining them if they run too hot repeatedly.Thanks grey wolf, just checking though would a brushless run ok on ni-mh battery while I look into lipo or wait before swapping out the motor, just thinking as I’m converting the 27mhz to 2.4 I might as well swap out the motor while I’m at it