ubeam

Dave Jones of EEVblog debunks the uBeam ultrasonic wireless phone charging technology and explains why it is not practical. He covers efficiency, coupling loss and safety, and responds to the founder's remarks about engineers.

A two-minute 2011 clip of an early uBeam wireless power demo. It shows a short-range ultrasound charging demonstration.

A TEDxNashville talk by uBeam founder Meredith Perry about becoming a technology innovator and her plan for wireless charging of phones.