I have a T-Hawk small parkflyer (similar to AeroBird) and I am considering a new radio system. I am looking at growing into a radio so I want to consider a 5 or 6 channel system. Some of these radios hint that the receiver needs batteries. I am concerned that the lightweight of the T-Hawk can not afford to take more batteries on-board. Am I interpreting this correctly? - do most receivers require a couple of AA batteries?

Thanks!