Charging set to 80 percent limit but it keeps charging over 80 percent

[RickyCMC]

I set the limit to 80 percent and it worked for like a week so so and now all of sudden it’s charging over 80 percent. Why is this happening?

 

[x34]

to calibrate.

 

[TokyoKiller]

I set the limit to 80 percent and it worked for like a week so so and now all of sudden it’s charging over 80 percent. Why is this happening?

From Apple’s iPhone battery page (linked in the battery section of your iPhone)

“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 (CA)

To improve the lifespan of your battery, your iPhone learns from your daily charging habits.

support.apple.com

 

[BugeyeSTI]

I setup a shortcut that tells me when the phone is at 85% so when it goes past the set 80% I can pull it off the charger. It happens every so often so it hasn't been an issue in my case