(I can't find this issue on the forum. Sorry if its a duplicate) I had 39% battery before take-off, flew for two minutes in backyard and got a 'critical" warning, and the quad started landing.... Fast. I was only up about 20 ft, and by pushing up on the stick, I was able to land softly. Took quad inside, turned it back on, and battery reset to 35%. Temp outside was 39-40 degrees. Is this a common experience? If I had been a few hundred feet in the air, I believe I'd have taken pieces back to the house.