We don't usually associate RCA
with new and innovative technologies, but we
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.