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?

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[–] 2 points 4 weeks ago

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.

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