"Hey guys - I've been facing the same issue with some cheap chinese ESCs. They would just start beeping when being taken out to the cold. So, after being quite pissed that I cant fly my drone and will have to redo all the soldering again, I've done a…"
"Hey guys - for anyone that has been looking what ESCs to buy for cold weather - choose these:ZTW Spider Series 30A OPTO
Tested on my new build, no issues whatsoever. -20 Celsius? No problem! Work like a charm."