This little guy, the Febot, charges your batteries, literally. Like, it literally charges Duracell (and other, lesser brands) batteries. Well, “literally” is a bit strong, as it’s only a concept, but whatever.
What it does is charge batteries using THE POWER OF WIND. You plop the Energizer in there, then stick the contraption on the window. There, it catches wind that turns the little propeller-things which turns the motor.
It’s an ingenious device. Too bad it’ll never be more than a render, probably.