Levitating wireless charger

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So Cool 😮
It seems to be working with an iPhone? How?
@kevin_chiu it only charges a special battery case. Which, annoyingly, these promo shots don't show the iPhone in.
Wireless power transfer is around for years, wireless energy transmitted to electrical load from a base or transmitter. Energy is sent through waves and on other end an inductive coupling to electrical device, which can then use that energy to charge batteries or run the device. There are some drawbacks are in this technology like power loss and distance limitations but still that's enough for the magic.
I gotta get one of these and teach my cat to paw at it to keep it spinning all the time