BetaFPV Beta85X HD Cinewhoop Review and Setup Tips.
I was going to pull this video since there have been several reports of the Beta85X ESCs catching on fire with 4S batteries. However, since the hit rate is high, I left it up with this warning, do not fly the Beta85x on 4S batteries! You should be fine with 2S and 3S. I have been flying mostly on 3S because I have a lot of them for my other quads. I have had no issues to date.
BetaFPV posted on their blog that they have a known issue with the Beta85x running on 4S. Link below from BetaFPV: