Ehh, I can get a replacement for pretty cheap and have the shell swapped by someone who knows what they’re doing.

That might be it, though I believed I used plastic tools. The only thing I unplugged was the cable that runs between the two plastic panels.

That’s possible, but my initial repair didn’t involve touching the battery at all. I only messed with the other side where the anchor is for the tablet.

Yeah it’s got no signs of life, even when connected directly. I opened it to replace the plastic clips that lock the joycons onto the tablet, as after only a few months they had worn down to the point of being useless. I could have sent it to Nintendo and that would have probably been the smarter option, but I noticed IFixit sold metal replacements and the job seemed simple enough. I did the replacement on both joycons and right after they both worked fine. It was only the next morning that the purple one ceased function. My red/scarlet one still works fine.

Bought a Hori split pad for a temporary replacement and it worked fine… Until the opposite side stopped working lol. I know the tablet is fine though because one of the split pads works and one of the joy cons works at the same time.