I have been flying my cx2 with Xtrme motors and Mega power batteries, and the motor temps and battery temps have been extremely low after a long flight. Yesterday I deceided to use my 2 e filte stock batteries to see the difference between the batteries, and well there is very much a difference. The helli's climb rate is slower and you need more trim for yaw, and after a full flight the motors are hot and the batteries are very warm. So I let everything cool and then grabbed a mega power battery and started to fly and on lift offalmost hit the ceiling it went up so fast, and after that flight the motors were still cool and so was the battery. Funny how burst rates and amperage can make such a differnce. The motors seem to be more efficent and run cooler with the higher mah and higher current flow of the mega powers, probly designed for batteries like that. })