I bought it in June of 2022. Now the battery health is stuck on 90%, but I feel that its not real. My phone lasts about 2 hours from 100% to 0%. Battery hasn't been changed. Thanks in advance to anyone that responds!
The capacity percentage shown in iOS is a rough estimate. Don’t rely on it. Estimating your own cycle count may be more accurate. You have an 18 month old device. The battery is only good for 500 cycles, which means if you’re charging a cycle every day, your battery is already overdue for service.