RE: 2nd time DX6i has lost its bind.
Lost a plane a few months back. Convinced myself it was because my DX6i and AR6200 lost bind. Found out a bad switch was the culprit. When I replaced the plane, instead of using the same Nimh battery set up, I went with a 7.4 1350 mah lipo for my reciever and put a 5.6 regulator between the battery and reciever. A new switch too!
When I started flying the new plane, I checked the battery after each flight and found that the voltage drop was negligable with this set up. I would go down to the field two or three times a week and it took two weeks before I charged the reciever battery again. I probably didn't need to yet, but I couldn't believe I was getting that much time between charges so I charged it just to be sure. AFter charge, I started with 8.2 volts, flew six flights, and had 8.09 when I quit for the day. Haven't had a glitch with the DX6i after the battery swap other than the throttle trim switch went bad. I got up trim but didn't have down trim. I hear the trim can be an issue with the TX so I've sent mine in to be gone over. It's only about 4 months old and now that bothers me more than the bind concerns. I'm back to being happy with the 6i for now, more so after I get it checked out and back to the field.