Why did my iPhone battery charge limit change after iOS 18.3.1 update?

Helll

my battery was charging good in update 18.3

i set charge to 80% and after charging hit this 80 it stops charging so thats good to me


but after updating to 18.3.1 its not stop on 80 or 85 it keeps charging to 100




[Re-Titled by Moderator]

Posted on Feb 14, 2025 01:09 AM

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2 replies

Feb 17, 2025 04:27 AM in response to RakanSy

Apple states in their support documents that optimized charging may occasionally charge a little higher and a little lower than the set charge level. In addition it will occasionally charge to 100%. This is necessary for charging algorithm to learn what 100% actually is. Think about it. How can it charge to 80% if it doesn’t know what 100% is.


>>If you have Charge Limit set to less than 100 percent, your iPhone will occasionally charge to 100 percent to maintain accurate battery state-of-charge estimates.<<


About Charge Limit and Optimized Battery Charging on iPhone - Apple Support


The iPhone has to do this so it can calibrate to 100% battery capacity. It’s normal. 

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Why did my iPhone battery charge limit change after iOS 18.3.1 update?

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