How low were the batteries? I've never taken it to where the batteries are gone in the air. I would think it wouldn't let you do this, but there are so many warnings from DJI about "landing immediately", is it possible you came up 10' short? I'm curious not to be critical, but just for info so I don't it. One thing annoying about DJI part sales is that if a gimbal arm breaks the camera assembly includes the card reader.