I dont understand how my Air 3 batteries (all three) dont last more than 25-28 mins EVER!. I recently did a static timelapse. Basically flew it up some 100 metres and started the timelapse. No time spent in waypoint selection, no movement, and it wasnt even windy that morning. And I thought at least this would get me close to the advertised range of 35-40 mins. But that was not to be. At about 18 mins it began warning me of low battery with about 20% left. I pushed it to about 6% since I would have to just lower it in a straight line to me and it wouldnt have needed anymore than 2% for that. At the end the result was roughly 23 mins; in a situation where I thought I would actually get higher range than my average of 25-28 mins. How can all three batteries be faulty? What am I doing wrong here? Or is this normal?