[Someone]

That's true, but the statement was as to its usefulness in emergencies. This thing is fixed to the wall, limiting what you can use it for in an emergency. For example, if you have to find your car keys in a different room, make emergency repairs to your water mains after an earthquake, or figure out how to get a friend out from a collapsed wall in the dark, a torch is more useful.

For emergencies, I would prefer a mechanically powered flashlight with a supercapacitor over this thing.