Matthew Chabalko, Mohsen Shahmohammadi, and Alanson Sample of Disney Research:
Wireless power delivery has the potential to seamlessly power our electrical devices as easily as data is transmitted through the air. However, existing solutions are limited to near contact distances and do not provide the geometric freedom to enable automatic and un-aided charging. We introduce quasistatic cavity resonance (QSCR), which can enable purpose-built structures, such as cabinets, rooms, and warehouses, to generate quasistatic magnetic fields that safely deliver kilowatts of power to mobile receivers contained nearly anywhere within.
This is still pretty experimental — the paper shows the setup in Fig. 3, and it’s transmitting power via a giant copper pole and conductive walls. Still, this appears to be one hell of a leap over previous wireless power solutions in terms of both its compactness and flexibility. One photo in the paper shows an iPhone mounted in a slim case with a receiver.
Just imagine a future where transmitters like these are as ubiquitous as WiFi, and the possibilities that open up when batteries can be that much smaller or, perhaps, unnecessary, in some applications.