Earth Battery lighting LED

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A simple earth battery project recorded last April of 2010. There is no electronic parts included, just a direct connection from the trash soda/beer earth battery can to the LED.

I'm thinking of making a working model to charge my cellphone battery and maybe later my laptop...without the aid of an oscillator or any circuit, maybe it is possible to use the energy directly from this simple natural device by increasing it's current rating...thinking...thinking..
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