I have had my Phantom less than a week and have successfully crashed it hard enough to do actual damage in some way. After losing control by flying into some heavy RF interference, I hit a tree and crashed to the parking lot. I found the unit with the camera off, the battery out and smashed, and some cosmetic damage. After getting the camera re-attached (mostly just remounting and plugging in some wires), I inserted a fresh battery and everything powered on successfully. The Vision app connected and I saw visual from the camera. However, a message popped up saying "MC Invalid Battery". I tried with a third battery, cleaning the interior pins, reseating firmly and softly and in between, and even calibration. Nothing worked. I connected the Phantom to my computer and fired up the DJI assistant software. The software sees the unit and gets data from it and everything else is fine apart from a flashing red/yellow warning triangle in the bottom right hand corner with a message about "Not DJI Intelligent Battery". I tried reinstalling current firmware I have Googled frantically as a sick feeling settled over me in finding no clear answers apart from sending it back to DJI for repair. I'm quite technically capable of repairs myself (as I am sure crash-related problems are not covered under warranty) but I was hoping someone might have some insight to get me started.