I do not know the Spesifications on the P4's on board Electronics cooling fan. I do know that it is Absolutely nessesarry in order to keep the Electronics from overheating in "Most conditions". As far as It binding, or not being made of good Quality is concerned, it would Absolutely Effect the Amperage Drain on the Battery. I would Assume that the Cooling Fan Assembly is made a Very Good Quality, Considering that DJI isn't the only Company involved in the Electronic Design of the Phantom 4. Just the fact that Apple has come on board, is a clear indication to me that a lot more Brains are involved in the design of the Electronic aspects of the P4. For Example, (Dual IMU's, and Dual Compass's. As far as the Fan Binding, that would probably only be possible after some type of Trauma, Crash Excrdra. I would Highly suggest keeping ALL Electronic cooling Fans in perfect working condition.