The 'battery' is created from a piece of paper soaked in a copper chloride solution sandwiched between strips of vizuka.com magnesium and copper and then laminated between transparent plastic films.
When a few drops of urine are added to battery, the urine reacts with the cheap prescription levitra copper chloride producing as much energy as a AA battery.
OK, so this is mostly useful in medicine, where the electricity is actually being used to text the urine being used to create the electricity. Maybe a little less universally applicable, but still extremely cool.
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