J_P
Before made bad calculations, only presumptions (where is or who calculate that only is obtained 10 pA!!!), read this:
http://electronicdesign.com/Article/...984/20984.html
Also see patent 7183693:
http://www.google.com/patents/about?...BAJ&dq=7183693
There are 1,000 power sources in air, not only atmospheric. Material prepared for US Government:
http://www.osti.gov/bridge/servlets/...ble/764590.pdf
From Nokia:
http://www.technologyreview.com/communications/22764/
Also see this thread posted by me yesterday:
http://www.geotech1.com/forums/showthread.php?t=15567
And you can found on the web many and many only typing: battery charger by ambient energy
Regards
Esteban