User level: Level 1 (4 points)I have both "Optimized Battery Charging" and the "80% Charge Limit" enabled at the same time in Battery settings. My iPhone still charges all the way to 100% instead of stopping at 80%, and this is not the first time I've charged it with these settings on.
Is this normal behavior, or should the 80% limit be respected consistently once the settings have been active for a while?
Posted on Sep 19, 2026 4:21 AM
User level: Level 9 (64,078 points)Sep 19, 2026 4:50 AM in response to Cruzzzzzzzz
Hi, that’s completely normal and Apple references it in several support articles. The algorithm used to calculate charge percentage, battery health and monitor charging has to occasionally recalibrate to 100% to more accurately determine actual charge percentage and other parameters. It may even charge to 100% several times in a row. It’s perfectly normal and for maximum battery life, just let the algorithm do its thing.,
User level: Level 10 (93,009 points)Sep 19, 2026 4:51 AM in response to Cruzzzzzzzz
The optimised charging feature takes a while to adapt to your charging habits and locations where you charge your iPhone. My iPhone is being charged at home in the evening and stays connected to the charger all night.
After a while of charging it right to 100% although optimised charging has been active, the iPhone now charges up to 80% and informs me, that it will be fully charged two hours before I get up and take it off the charger.
Have a look at the related article:
About Charge Limit and Optimized Battery Charging on iPhone - Apple Support
My Apple Watch is also set to optimised charging, but since I wear it 24/7, the watch always charges up to 100% when I connect it to the charger.
The watch of a family member, which is not worn during the night, will stop charging at 80% and showing this status when put onto the charger in the evening.
Originally posted at discussions.apple.com/thread/256360416