I dont trust spektrum after I was buddy boxing my dad on his alpha 40 with two DX5E's and on the 3rd flight of the day the plane started doing all kinds of crazy stuff on its own and the throttle started pulsing up and down like crazy,couldn't do anything but watch it loop/twirl its way into the woods listeninng to the engine go back and forth from idle to WOT over and over. I read alot about spektrum and needing more battery for a regular rx but I figured if he kept them charged up and we were only on the third flight this stuff is junk. Also The dx5es we were using only use 4 aa batteries(he had spektrum brand rechargables in them).But this was always suspect to me as well.Oh well,lesson learned I will never buy spektrum anything(or jr).I have had good luck with airtronics(curently using) and futaba.</p>