Whats your lowest landing voltage? Do you drain your batteries while flying more than 3,5v per cell so all in all 21v? Back in the days i read that going below 3,5 will damage the battery.
3.6v is a good place to set your battery alarm. You do not push you battery lower 3.3v There are plenty of topics about it on the web
Thx. Yes i have set my alarm to 3,6 and land when its 3,5v. I installed an additional telemetry that shows the used mah and there would still be some mah to use when landing at 3,5v. Like when flying 2x10000mah i use about 2x5000mah when it shows 3,5. theoretically you could use 80% of the capacity. That would be 2x8000mah. Maybe its shitty batteries