If no work has been done on the device previously, I would start with a new battery.
It sounds like the battery isn't sending good "gas gauge" data (i.e. battery about how much is left in the proverbial tank). That could be a board problem, but more likely the battery is just giving up the ghost and its time for a new one.
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***EDIT 02.09.2025 -*** If you suspect this may be a board issue, here's an image of that the area around the battery connector ''should'' look like.
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There will be a foam sticker over this area typically, so its easy to knock bits loose with a tool since you cant actually see that they're there.
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[image|3547906]
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Areas highlighted in red contain components which carry the signal for battery data. If those areas look like they may have been disturbed by a tool, you may need a board technician to correct the issue
If no work has been done on the device previously, I would start with a new battery.
It sounds like the battery isn't sending good "gas gauge" data (i.e. battery about how much is left in the proverbial tank). That could be a board problem, but more likely the battery is just giving up the ghost and its time for a new one.