On the surface, it looks like a really cheap scam. The demo is so easy to cook: the device already has a battery, and you can load a blackberry when you plug i

On the surface, it looks like a really cheap scam. The demo is so easy to cook: the device already has a battery, and you can load a blackberry when you plug it to it? Sure. How do I know the energy is coming from "ambient wifi signals"? I'm also suspicious of basic physics. Basic specs for a blackberry charger: 5V at 800mA. In theory, I could place 100 of those devices easily in a room, and they would all be able to generate such power. I'll be nice and assume that I can't stack them in 3D because they'd block each other's reception, so I'll agree that I can't stack 10,000 of them in one room and get the same results. How much power do 100 blackberry chargers generate, and how does it compare to the power generated by one wifi antenna? If the former is more than the latter, we have a serious physics impossibility.