We don't usually associate RCA with new and innovative technologies, but we think know they're on to something with its Airnergy power system, which harvests energy from WiFi signals. Shipping this summer, the pocketable dongle picks up WiFi signals from the air and manages to charge an internal battery through some magic inside. You don't have to connect to a network, you just have to be in a place that has signal, and it will automatically charge up. As if we weren't intrigued already, they told us that they're planning on building the tech into actual cellphone batteries, so you would theoretically never need to plug in again and your device would always be topped off. Yeah, we want.

Airnergy WiFi power system hands-on

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Airnergy WiFi power system gives RCA a reason to exist (video)