Clippings: How Does It Work?


Laser system wirelessly charges phones from across the room

We've cut the cord for communication, thanks to Bluetooth and Wi-Fi, but charging our little pocket supercomputers still takes a tether. Judging by the range of wireless charging technologies in the works, that might not be the case for much longer. A team from the University of Washington has demonstrated how lasers could be used to charge a device from across the room.