That sux. So I just got back from flying 5 1/2 batteries. 1-5 smooth and rock steady. On the 6th battery I get out to about 800 feet and she starts acting weird. All of a sudden she starts flying off, I had to counter her directions, which she did respond too. As soon as I stopped she'd angle down and start fly by herself! I managed to get her back within a 100 feet from me and I'd let go from the controls and she start to fly off again. By this time my heart was pounding pretty **** hard. I managed to catch a few glimpses and I was still in GPS and green "safe" to fly. This was my first flight of the day in camera mode, instead of filming but I could see that the gimbal wasn't responding to her abrupt attempted fly offs. Finally after the longest two minutes of my life I was able to land while countering whatever direction she was attempting to go. Wind was gusting but nothing over 10 and my sensors were great before all 6 flights. Afterwards my compass showed high 1700's (previously 1490's-1520's) and all x,y,z's were still spot on. She said no IMU cal required as well. I'm am now officially scared to fly my I1 until I get this sorted.