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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[–] 9 points 11 hours ago

Try sticking it into battery storage mode for about 30mins then restarting it using the mains lead

https://www.ifixit.com/Guide/How+to+Enable+Steam+Deck+Battery+Storage+Mode/149962

That process won't harm the steam deck and resets a lot of things if they start acting weird, like the touch screen as well.

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