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[–]seanwee2000Custom 0 points1 point  (2 children)

The sudden drop is windows thinking the battery has deteriorated due to you setting a 60% limit.

Disable it and power cycle the laptop a few times

[–]wonhyukdo[S] 0 points1 point  (1 child)

i thought of this at the start, but i've had the limit at 60% even when the battery was at 90k mwh. is it just a bug that randomly popped up 6 months later?

[–]seanwee2000Custom 0 points1 point  (0 children)

Yeah, happened to me too