On Wireless Charging
Arthur and I, on a long London walk, once discussed whether a wireless charge would one day be possible. He noted this impossible since a charge must be transferred via a conducting path of some sort. Here is what he says about PowerKiss:
What they're doing here is putting you and your electronics inside a big electric field. Maybe a little bit analogous with those wires they bury in the asphalt at intersections to detect when cars are stopped at the lights, or your electric toothbrush which charges when you put it in the stand. I'm surprised they can get enough energy into the little receiver to charge a phone. Maybe over a long period of time you can charge it.
We're not talking about a lot of energy to run a phone (as evidenced by the tiny battery).
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