im on 3.1.1....i could swear it was there, but now it's not....I would also swear that there was a Never option under 'Automatically Power Off after....' but its not there either.
ETA: huh...just powered off and back on and everything is back to where I wanted it. The % shows and so does the never setting.
I have no idea what happened, but I know better - Turning it off and on again should have been my first step!