Battery health drop faster iphone 15 pro

For every 25 cycles, it's more common to see a 1% drop in Battery Health. As such, since you've only lost 6%, you're doing better than expected. 300/25 = 12. 100-12 = 88. But you're at 94%, so congratulations, your battery health is very good after 300 cycles. Battery Health goes one direction only and that is down. When it dips to 80% in the future, which it will if you own the phone long enough, it will then be time to pay Apple to replace the battery. Until then, worrying over the natural decline of battery health is pointless. It is NOT possible to stop the decline.

you Can expect a decrease in health of 1-2 percent each month, generally 1 percent for each 25 charging cycles. Your battery performance is fantastic.