Better than Cold Fusion: Wireless Power via Ultrasonics, from Rocky Humbert
I get a headache just thinking about this. My dog won't like it either. But if it's true, it will make WiFi look so yesterday.
"uBeam Declassifies Secrets To Try To Prove Wireless Power Is Possible":
Essentially, transmitters on a room's walls track devices with uBeam receivers and send inaudibly high-pitched ultrasound beams at them. The receiver converts the vibrations of the sound into electricity, which charges a connected device. uBeam is designed to deliver a minimum of 1.5 watts of electricity to smartphones, or enough to keep a phone from losing battery life even when being heavily used. Depending on the number of devices being charged simultaneously by a single transmitter, and depending on the distance of those devices to the transmitter, uBeam could charge devices at comparable rates to a wire, or faster.