Leaf. The Japanese automaker lit up its impressive Leaf-powered Smart House at the Tokyo Motor Show last week, but also demoed its wireless charging solution for a much smaller crowd at the company's Oppama factory. The device uses electromagnetic induction to transfer power between a charging pad and a receiver on the bottom of the car, with an efficiency level between 80 and 90 percent -- simply park your EV directly above the system to begin charging, and monitor progress on the ground transmission unit's control panel. The pad is expected to become available as soon as 2013, but will only be compatible with new vehicles, so you won't be able to use it with an older Leaf, unfortunately. There's a silent demo video waiting for you just past the break.