@NormanDunbar @bornach I've got some of the cheap 4056 charger module variants which have over discharge protection built in. I'm going to track down those usb dc boost modules though, they look very handy.
@concretedog @NormanDunbar
I have 10pcs of those modules too. Problem is I now have over 60 unprotected batteries and I keep finding more. Might have to parallel them up or make my own BMS
https://youtu.be/qRVEJjk5B_g