Instead of induction, WiTricity uses resonance to recharge devices wirelessly over several inches or even though objects.

Charging gadgets wirelessly today generally uses one of two technologies: Magnetic induction or magnetic resonance. Instead of induction, WiTricity uses resonance to recharge devices wirelessly over several inches or even though objects. The company demonstrated this, along with a magnetic resonance repeater, and announced a wireless charger for iPhone 5 and 5s devices.
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