20k + 11k for official apple battery. 31k .. I won’t put unofficial battery on apple product which might blow
read the ad.
try to respect what's in the op - price, condition, etc etc.
if it doesn't suit you, move on.
if you're going to make an odd 30% off offer from the last drop, that's as ridiculous as it gets.
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https://developer.apple.com/forums/thread/655506
this is the same issue in the MacBook.
when i had downgraded from Big Sur to 10.6 (iirc) battery condition showed normal.