[Swordmaker]

I’ve had battery issues since updating... :-(

Charge your device to 100%. The hold the power button and home button in simultaneously until the device shuts down. Restart from cold. This usually fixes the issue.

[Not gonna take it anymore]

“The(n) hold the power button and home button in simultaneously until the device shuts down.”

Doing this (just now) just restarted it. It did not completely shut down.