It is weird that there are two options in the Low Power menu in the simulator menu. There is one entry for Enter Low Power and another for Exit Low Power. This is a bit confusing when you look at it because the item that was last selected is checked. i.e., if the simulator is in low power mode, the Enter Low Power option is checked.
It would make a lot more sense if there was just one menu item labelled Low Power Mode on the existing Settings menu. It would have a check mark when in low power mode and no check not in low power mode. This would be consistent with the Tones and Vibrate menu items that are already there, takes up less space on the menu bar, and makes more sense.
