@nprofile1q... I like “inexpensive” as much as the next guy (probably more, given my AliX habit), but I’ve just decided to stick with Milwaukee OE batteries. They just work.
I’ve tried at least four different M12/M18 3rd party ones and they all are fine for a little while, then plastic starts breaking, doesn’t maintain contacts, etc. I’d put them in a light or radio maybe, but for a tool that does work - OE only.
(And preferably the High Output ones - they let the tool deliver rated output.)