Apple Software Updates a Twitter: "When the optimized battery charging is used, there is a notification in the Notification Center with the time that is going to reach 100% and the option
13 small but incredibly useful changes and features in iOS 13 - AppleToolBox
Optimised Battery Charging: One of the Best iOS 13 features
About Optimized Battery Charging on your iPhone - Apple Support
iOS 13 iPhone features: What is Optimized Battery Charging? - 9to5Mac
iOS 13's 'Optimized Battery Charging' stops charging your iPhone at 80% - All Things How
optimized battery charging ios 13 Off 67% - canerofset.com