A company called RCA has created a quite miraculous gadget based on new technology that enables devices to extract energy from WiFi signals.

The new AirPower batteries, named because they seemingly get their power from thin air, are able to fully charge in 5 or 6 hours by harnessing the ambient energy produced by WiFi signals.

This means you’ll be able to use these AirPower chargers wherever there is a WiFi signal; at home, at the office or within a public WiFi hotspot for free.

Their initial intended use is for emergency back-up power supplies, but we’re sure the uses will expand as the technology develops – wireless electricity for instance has long been talked about in scientific circles, it seems we’re getting a few steps closer to realizing this technology with AirPower.