Instant power loss as soon as unplugged
No recent drops or bumps that I can recall
SteamOS reports 100% battery and healthy
Opened it up and reseated battery connections, everything looks ok but no dice
Claude guesses it’s still a failed battery but don’t want to drop $130 on a guess, any other suggestions before I buy a new battery?
Multimeter, as another poster said. Be careful not to short the terminals. I do recommend you ask someone for guidance who have some electronics experience, lithium batteries can be a little dangerous if you are very inexperienced… And even if you have some experience.