
In case anyone is interested there are eight (8) cells in a 7900mAh 4s H520 battery. I had a 6 month old one die on me in flight! Not a good thing! I have/had 2 that worked fine in my PLUS. Was getting a true 19 minutes prior to the crash at 14 minutes.
Minimal damage, except for the camera. She flew fine on Sunday.
Before you ask, yes all my batteries are properly maintained.