Designer Vil Tsimenzin has a knack for creating interesting designs. The designer is now working on a concept to create energy efficient power tools. This drill for example, relies on a rotary generator (wind up generator) for its primary power source, effectively doing away with the need for another power source. Granted, rotary sources can provide intermittent power, but drills generally don’t have to be in action for hours. It’s just the drill for now, but there’s a good chance other tools based on similar principles may follow.