iPhone battery cycle count increases after 60-80% usage and not 100% usage

Why is my iphone cycle count adding 1 everytime 60-80% of total battery gets used and not 100%.

At the time my iphone turned to 150 charge cycles, I had started recording down how many battery i used each day until I got to the next cycle count. On Wednesday, i used 3% after it turned to 150 cycle counts, on Thursday 38% and on Friday 22% and on saturday 18% until it turned to 151 cycle counts. If you add that all up it is 81% and NOT 100%. I check that a lot per day and i dont use that much battery so i cant really dismiss as “error margin”

Posted on Oct 10, 2026 12:17 PM

1 reply

lobsterghost1

Level 10 (233,174 points)

Oct 10, 2026 1:12 PM in response to connerghys

connerghys wrote:

Why is my iphone cycle count adding 1 everytime 60-80% of total battery gets used and not 100%.

At the time my iphone turned to 150 charge cycles, I had started recording down how many battery i used each day until I got to the next cycle count. On Wednesday, i used 3% after it turned to 150 cycle counts, on Thursday 38% and on Friday 22% and on saturday 18% until it turned to 151 cycle counts. If you add that all up it is 81% and NOT 100%. I check that a lot per day and i dont use that much battery so i cant really dismiss as “error margin”

Battery health is approximate and not exact, nor linear. You are going to literally drive yourself completely crazy if you think you can micromanage the Battery Health on your iPhone. You simply can't. It's going to decline no matter what you do and when the health dips to 80% or lower, that's when you pay Apple to replace the battery in your iPhone.

In the meantime read this and any of the embedded links in this user tip --> Battery Health Decline - Should You Worry… - Apple Community