Inventor Connor Klein's "Outlet Regulator" will actually spit out plugs that are draining electricity from the outlet unnecessarily. He explains:
it is hard to tell when electronics are or are not taking energy and many never stop taking energy if they are plugged in (e.g. cellphone chargers). this product solves that problem by using a timer circuit and electromechanics to eject its plug which disconnects your device from the wall outlet.The device was inspired by a the behavior of a leech falling off its host when its full. Here's a video:[vimeo][/vimeo]There's more information about the thing here.