[toast0]

> That's an interesting case of a display being off actually indicating something ("loss of power") which can't be replicated with a bistable screen.

My kindles usually show a dead battery graphic when I get back to them after a long time away... With enough power storage and the right trigger, this could be done.

[cubefox]

Yeah with a battery you can change the screen to "dead battery" when the battery is almost dead.