My iPhone8 shuts down when not connected to a power supply. This started when I got a message in "the "Battery" app that a performance management issue had been detected and a setting had been changed to prevent shutdowns.
My iPhone8 shuts down when not connected to a power supply. This started when I got a message in "the "Battery" app that a performance management issue had been detected and a setting had been changed to prevent shutdowns.
iPhone 8
