After IOS 17.4, we have to flash the phone and click"fix battery healthy"on 3u tools App or JCID APP to fix battery healthy,from older battery (78% 85% 87% 91% 93% ete)to 100% battery healthy.
This is BUG from Apple company, not procut quality issue iteself. If you care this point or you don't know well how to do, please try to purchase "StellarXcell Ultra" battery, which is more easy and more premium material for personal customer and phone repair service prodivder.
StellarXcell Decode battery is more suitable with refurbished phone reseller, it can bring extra value to the phone when the phone is displaying "genuine parts" and" 100% battery healthy"