My iPhone 8 battery health is at 75% what do i do?

Apple considers that an iPhone's battery needs to be replaced if it cannot maintain, at least, an 80% charge after 500 full recharging cycles. If this be the case for you, you should have it replaced by your local Apple Store or Apple Authorized Service Provider.

Tesserax wrote:

Apple considers that an iPhone's battery needs to be replaced if it cannot maintain, at least, an 80% charge after 500 full recharging cycles. If this be the case for you, you should have it replaced by your local Apple Store or Apple Authorized Service Provider.

Probably even before it reaches the number of nominal rated cycles. I've had Apple OEM batteries that I had past the warranty period that dropped in battery health long before reaching the rated cycles.

I was kind of disappointed, but it was way past the warranty period. My current iPhone battery is at more than 700 cycles and reports 88% battery health.

I don't think there's any kind of discount for dropping below 80% battery health before the number of rated cycles if it's past the warranty or AppleCare period.

Good point! Thanks!