EEVblog #55 - RCA Airnergy WiFi Charging Free Energy Harvesting Marketing BS

Dave can smell marketing bullshit a mile away, so checks out the new RCA WiFi Free Energy Harvesting "Airnergy" device with some back of the envelope calculations. Marketing bullshit or can it actually work?
Can you really charge your smartphone with Wifi Energy?

Watch the RCA video here:
http://www.youtube.com/watch?v=IMMbihbeIls