ORIGINAL: lookyj
One great feature of the the DX7, "model select" it only binds to the correct receiver. It's a life saver when you have 9 models programmed into your Transmitter!
I also found a great Lipo for the DX7 from Common Sense RC get the 2500mAh (#LP-TX2500) however, it seems they have an upgraded V2 model just released..
http://www.commonsenserc.com/index.php?cPath=37_27
hopefully, I won't have to plug in the "electric" blanket for my DX7 anymore..
the only diff between the v1 and the v2 is the balance plug's polarity. The v1 is reverse of eflite, and the v2 is the same =) so get the v2 unless you want to see sparks fly. The v2's have been out for about 8 months or so.