I bought my iPhone at the end of March 2025. I’ve been using it “normally” (no gaming, heavy apps etc…) since then, however the battery’s capacity dropped to 99% within only 46 charging cycles. I don’t think this is normal. What do you think?
[Re-Titled by Moderator]
iPhone 15, iOS 18
It is way too early to make any determination or conclusions about your battery.
Because of the way that Apple rounds off any tenths of percentages in the battery display to a lower number, you may be being fooled as well.
For example, a battery that drops from 100% to 99.9% will be displayed as 99%, even though the battery only declined .1%.......not 1%. If you want to see tenths of a percent displayed, you will need to look for special 3rd party software.
Battery decline is not linear. The battery might decline 2% in one month and then not decline at all for 2 more months. Batteries are chemical devices, they don't follow a lot of set "rules".
After 6 months or so, you might be able to get a general idea of how your battery is doing.
Divide the number of Charge Cycles by 50 and that number should represent how far the battery has declined. For example, a phone has completed 250 Charge Cycles.
250 divided by 50 = 5%, so the Maximum Capacity on the battery should read about 95% at the time.
At 1,000 Charge Cycles, the battery should be at about 90% Maximum Capacity.
Finally, you will drive yourself crazy if you are looking at the battery numbers all the time. You won't be helping the battery in any way, but you will likely be doing a lot of needless worrying. The battery is going to do what it is going to do. It won't help at all to try to babysit the battery.
It is way too early to make any determination or conclusions about your battery.
Because of the way that Apple rounds off any tenths of percentages in the battery display to a lower number, you may be being fooled as well.
For example, a battery that drops from 100% to 99.9% will be displayed as 99%, even though the battery only declined .1%.......not 1%. If you want to see tenths of a percent displayed, you will need to look for special 3rd party software.
Battery decline is not linear. The battery might decline 2% in one month and then not decline at all for 2 more months. Batteries are chemical devices, they don't follow a lot of set "rules".
After 6 months or so, you might be able to get a general idea of how your battery is doing.
Divide the number of Charge Cycles by 50 and that number should represent how far the battery has declined. For example, a phone has completed 250 Charge Cycles.
250 divided by 50 = 5%, so the Maximum Capacity on the battery should read about 95% at the time.
At 1,000 Charge Cycles, the battery should be at about 90% Maximum Capacity.
Finally, you will drive yourself crazy if you are looking at the battery numbers all the time. You won't be helping the battery in any way, but you will likely be doing a lot of needless worrying. The battery is going to do what it is going to do. It won't help at all to try to babysit the battery.
It is normal. On average Battery Health will decline for each 50 +/- charge cycles. It is not exact, but you are so close to 50 charge cycles that a 1% drop in battery health is normal and not cause for concern. There is no way to stop battery health decline. When the day comes that the health of the battery declines to 80%, it will then be time to pay Apple to replace the battery. That will happen about the time your iPhone has logged about 1000 charge cycles. So you are a long long way from that day.
Thank you so much!
thank you that’s really insightful! I guess I will let the battery do its job and when it’s time to replace it I will simply go to an Apple Store for that
RamyKh wrote:
Thank you so much!
You're welcome.
Why did my iPhone 15's battery capacity drop to 99% in less than two months?
