https://www.amaflightschool.org/getstarted/how-do-i-rescue-over-drained-lipo-batteries
Hi, i let my lipo's sit for a bit to long and now some of them are at 0V. A friend of mine send me this guide but idk if i can do it if they are at 0 V (what my battery checker says.
AMA Flight School
This article will show you how you can easily recover your LiPo battery without too much reduction in performance.