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I have been having problems with battery charging on my SE 20 iPhone. It usually charges fine until the last bit of percentage, then it seems like forever to get that last bit of charge. I like to get 100 % when I charge. What is slowing it down and what kind of settings should I be using?
iPhone SE, iOS 12
Your phone will charge at the fastest rate it can up to 80%. It think tapers the charge rate to avoid overcharging, and stops at 100%.
The absolute best way to get maximum use on a charge, as well as slow the decline of battery capacity long term is to enable Optimized Battery Charging (Settings/Battery/Battery Health) and charge the device overnight, every night. The battery will fast charge to 80%, then pause. During the nighttime pause the phone will use mains power instead of battery power, allowing the battery to “rest”, and thus reducing the need to charge the battery quite as often. The phone will resume charging to reach 100% when you are ready to use your phone; it will “learn” your usage pattern. If you enable iCloud Backup (Settings/[your name]/iCloud - iCloud Backup) the phone will back up overnight also, assuring that you can never lose more than the current day’s updates. Here's more information→About Optimized Battery Charging on your iPhone - Apple Support
Thank you, that was very helpful.
Battery charging slow
