I've got almost 3 hours flight time with zero issues. I got my second battery today and wanted to run it down to 50% to make sure there is no issues with it. I did the auto take-off and immediately noticed something weird. Normally the P3 will rise and hover around 4 feet off the ground. This time it took off but only rose to 2 or 3 feet and then started slowly loosing altitude. I gave some stick input to raise the P3 and it went up. No fingers on the stick it slowly started going down and then after awhile it would raise up. I flew around with no issues but noticed the altitude was going up and down when it was hovering in place more than normal. I swapped out the battery for my old one and it did the same thing. Auto take off. Didn't rise like normal (a lot shorter) and then slowly started loosing altitude and then would over compensate and rise higher up. I've done an IMU Cal, Gimbal Cal, and Compass Cal since I installed the latest firmware. Any ideas? It was windy and colder than normal outside.