iOS 11.3 has a new power management feature that unfortunately only works on iPads: Charge Management.
This is Apple's dummied down explanation as to what it's doing.
https://support.apple.com/en-us/HT208710
Basically it's keeping the device at a lower charge level to save the battery if it's plugged in all the time.
This is Apple's first acknowledgement that keeping a device (iPad, iPhone, MacBook) plugged in continuously degrades the battery. Yet---- they are only implementing this power management feature for the iPad.
I sure wish they included this new feature for iPhone as well.
This is Apple's dummied down explanation as to what it's doing.
https://support.apple.com/en-us/HT208710
iOS 11.3 includes a charge management feature to help maintain battery health, which monitors iPad for use in these situations and, as required, reduces the maximum charge level. The battery indicator will display the charge based on the adjusted maximum battery level. The maximum charge level will revert back to the previous level when iPad is no longer connected to power for prolonged periods and as conditions and battery health allow.
Basically it's keeping the device at a lower charge level to save the battery if it's plugged in all the time.
This is Apple's first acknowledgement that keeping a device (iPad, iPhone, MacBook) plugged in continuously degrades the battery. Yet---- they are only implementing this power management feature for the iPad.
I sure wish they included this new feature for iPhone as well.