Tnx I’ll do some tests when the weather gets better, I cannot increase cell count.
@Moksh
There are multiple batteries with those specs.
Are you using “LG ICR18650-HG2 3000mAh - 20A”?
20 amps may be too low.
I’ve found some data:
https://lygte-info.dk/review/batteries2012/LG%2018650%20HG2%203000mAh%20(Brown)%20UK.html
My pack is warm after flight but I’ll not define that as HOT, however the terminology HOT is quite subjective.
You should check the logs and take a look at your amp draw, if they get really hot you are drawing too much current, in that case the capacity decreases and you get reduced flight time.