Iphone Won T Charge Past 80. Buried in the list of extra features was a note about battery optimization Apple says it will be reducing the time your iPhone spends fully charged Specifically Apple will prevent your iPhone from charging above 80. There are two known reasons why this happens.

It can be Fixed. Time does its thing and iPhone batteries arent exempt from that. Using the 5-watt power adapter out of the box in the time it used to take your iPhone to charge its battery to 100 percent your iPhone is stuck at 80 or below instead.
Itll get to 808182 then stop or say this accessory is not supported.
Up to 50 cash back My iPhone has been charging for hours but wont turn on after update to iOS 15. The release of iOS 13 brought a new feature to the iPhone family called Optimised Battery Charging. It basically recognizes when you normally charge your phone and if its not around that time it only charges to 80. If I unplug and then plug back in the iPad lights up and then immediately shows not charging message next to battery.

