jkflow
TB RC Bashers
Lifetime Premium!
Premium Member
Excellence Award
Hospitality Award
Build Thread Contributor
Its all relative of course and never as cut and dry as numbers imply. Typical rule is to use 80% of your capacity and you have some safety margin. 80% is at 3.74V per cell. At 3.6 you are roughly at 5% i.e. if you go for just one more punch to jump you are almost guaranteed to do damage due to stress. You can sit idle with low discharge and nothing will happen damage wise. 80% is a good number for planes, not that critical for cars. You will find all kinds of opinions on this, mine is just one of them.I've never heard of discharging to 3.5v damaging batteries.
Damage is always shown by increase in internal resistance, as above. 1 cell is stressed, unless there is a wire or connection issue.