PowerSpot transmitter

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Status: Available, but more intended for niche commercial applications rather than consumer use

The PowerSpot transmitter powers devices like keyboards, remotes and wearables wirelessly. And when it says wirelessly, it means wirelessly — there are no charging mats here. The transmitter works by emitting radio frequency energy on a certain band. Special receivers inside other devices convert that radio energy into direct current, which power the devices and charge their batteries. The PowerSpot promises to charge up to 30 devices as far as 80 feet away.

You can purchase the PowerSpot for $100 from certain distributors, which includes a power cord and a USB wall outlet adapter. The company also plans to sell a development kit for $400.