Apple's battery guide describes lithium-ion batteries as "consumable components" that naturally lose capacity over time. To slow that decline, iPhones use Optimized Battery Charging, which learns your ...

Phone batteries degrade over time, but heat and use habits are a larger danger than keeping your phone plugged in.

From broken power cables and old, faulty plugs to damaged charging ports in your phone, there are multiple reasons why your iPhone or Android phone will no longer start charging when you plug in the ...