Power

Were you looking for the camera power or the flashlight battery?

Limited power is a mechanic in ''Night Shift Nightmare. ''It prevents you from winning the game by leaving all the doors closed.

Overview
A little box with text is seen at the top-left corner of the screen and indicates: "Power left: 800/800". This will decrease when the player uses the doors or the door lights. When the power reaches zero, the office will turn dark and the player will be unable to use the doors or the door lights. This is very likely to result in a jumpscare.

If one is lucky enough, they can complete the night with power zero. However, they will start the next night with power zero, causing them to eventually get jumpscared.