On an electric plane with ESC, DO NOT repeat DO NOT hook the battery directly into the reciever unless the battery is only 4 or 5 cells. If you are powering the receiver without the esc, then the 4 or 5 cell battery can be plugged into any of the channels. Normally, channel 1 = elevator, 2= aileron,3=throttle and 4 = rudder unless you are running JR which is quite a different order. If you plug a 7 or 8 cell battery directly into the reciever, you stand a good chance of wrecking the reciever (burning something out).