According to Death of the cell phone charger, “a Pennsylvania entrepreneur has developed technology that gives you all the battery juice you need directly from the air.” It all sounds a bit Atlas Shrugged. Here’s the scoop:
It may sound futuristic, but Powercast’s platform uses nothing more complex than a radio — and is cheap enough for just about any company to incorporate into a product. A transmitter plugs into the wall, and a dime-size receiver (the real innovation, costing about $5 to make) can be embedded into any low-voltage device. The receiver turns radio waves into DC electricity, recharging the device’s battery at a distance of up to 3 feet.