What's A Bad Battery Health Iphone. Simply put it means that something bad happened to your battery to make it not work properly and as a result your iPhone is slowing itself down to make sure it keeps running. Im only moderately addicted to my phoneso my iPhone 5s battery made it over two years before it really started to crap out.

There are at least 3 measures of battery health. How quick you run through those cycles depends on usage. A batterys internal resistance or impedance also increases with age.
A batterys internal resistance or impedance also increases with age.
Thats the upshot of Apples new Battery Health feature introduced in iOS 113 Thursday. If your phones battery health is at 79 or less it has been significantly degraded. How quick you run through those cycles depends on usage. Im only moderately addicted to my phoneso my iPhone 5s battery made it over two years before it really started to crap out.
