http://revolution-green.com/charge-phone-power-plant/
Have fun with this.
Mark
I have named this device a Power Plant. Everyone should own one, ha ha.
I really doubt that this works as claimed...more like some galvanic/chemical reaction going on that is not sustainable.
Bill
For some reason that I do not recall, someone had me knocking a nail into a tree if high up as possible. Measuring between this and ground gave about a volt - but it has galvanic written all over it.