SAN FRANCISCO, California (AP) -- Imagine juicing up your laptop computer or cell phone without plugging it into an electrical socket.
That's a luxury that could be provided by wireless power transmission, a concept that has been bandied about for decades but is creeping closer to becoming viable.
Building off work unveiled last year by Massachusetts Institute of Technology researchers, Intel Corp. demonstrated Thursday how to make a 60-watt light bulb glow from an energy source 3 feet away.
The Intel team did it with relatively high efficiency, losing only a quarter of the energy the researchers started with.
"That, to me, is the most striking part about it: transmitting 60 watts at 75 percent efficiency over several feet," said Intel's chief technology officer, Justin Rattner.
