Wireless charging has been around a long time. The medical community began using many years ago with pacemakers that were fitted with rechargable batteries and all the patient had to do to charge them was sit in a chair with the charge unit resting on his side.
Cheers,
Gary

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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)