Charging your phone battery through the Air,,,,

 Is it too early to see this king of technological advancement?

It is actually going to be on market this coming summer. So as the source said, this summer you can charge you mobile phone battery using WiFi signal. Basically using the energy currents that passes through the air all the time. The device name is Airnergy will cost you only a 40$ and it contains a battery of its own and continuously charging itself through WiFi. How long that takes depends on the strength of the signal and number of hotspots available. Then, when your BlackBerry needs a charge, you just plug in the USB end of the device and you’re off. During the demonstration at CES, the Airnergy charged a BlackBerry from 30 percent battery to full in about 90 minutes.