To use it, you'll need to brush your teeth in a well-lighted place, because there's a solar panel sticking out the end of this toothbrush, collecting those electrons that are transmitted to its business end for their bacteria-killing duties. The toothbrush is now being tested; there's no word on when it might hit the market or what its users might do for dental hygiene on cloudy days. Just kidding—it works with ordinary indoor lighting. [Canada.com, via bb Gadgets]