Originally Posted by writerguyfl

As PayItForward noted, I'm sure the door locks are battery-powered. Although it might be possible, connecting each door lock to a permanent power source would be a difficult endeavor without any real benefits. You'd have to embed the wires into the door and pass them through the hinge to the main wall.

That said, I wouldn't want to be in a guest room in a hotel without power. Those emergency lights won't last forever. Plus, there's a chance that the hotel's life safety systems (fire suppression, alarms) might be compromised. Since language is an issue, I'd be extra cautious until power is fully restored.