Today i did a nice flight in the Alps and decided to do a second but my spare battery was half charged, I decided to still go ahead as i was just planning to fly 100m around; when i started the battery was above 50%, after 30s the Mavic pro switched to auto landing as the battery was showing 30% and then 2% after 50s; the temperature was below 0 Celsius which was OK for the first flight which last 15 mns and started with a full battery and ended at 45%; I managed to bring it back and landed after a mn with 0 %. Strange behaviour, I uploaded the flight info for any comment.