Troubleshooting battery issues.

This happened at a very inopportune time so apologies for the text being a bit bad. background: framework laptop 13 with 7640 u running fedora 40. ran great for a few months. issue: played some games on battery power. battery health went from mid 90's to 43. i know playing on battery is bad for it but that is more what i'd expect if I took a hammer to it. what i've tried: rebooted, cleared upower history, removed 90% charge limit in bios then shut down and charged.

Any thoughts would be appreciated.

Edit: I ran it out of battery while on the bios screen then charged it to full before powering it on. Battery health is now showing 91%. I'll see if it lasts, but I'm glad I didn't just go out and buy a battery without troubleshooting first.