I thought I had been doing a good job keeping my batteries from puffing. I typically fly with 4 or 6 battery packs, and launch from 1600 ft elevation. I’ve even run them to 3.0V per cell without puffing and have flown at full throttle the entire flight. A few months back I spent a week flying at 6000 ft and only flew with 6 batteries. This week I’m at 6000 again and have been flying with 4 batteries, and they are all starting to puff. The puffing is not significant to cause a safety concern, but I am concerned about shortening the life of my batteries.
I believe the puffing is heat related, as the batteries are hotter than normal launching at 6000 feet.
The question I’m asking, is the thinner air at 6000 generating more heat for the batteries when flying (I’m sure I need more power to fly)? Would changing the pitch of the props help at higher altitudes? Would switching to 7 cell packs make a difference? Any other ideas?
Thanks in advance for any comments!