"...To make the battery, Lee and his colleagues soaked a piece of paper in a solution of copper chloride and sandwiched it between strips of magnesium and copper. This sandwich was then laminated between two sheets of transparent plastic.
When a drop of urine is added to the paper through a slit in the plastic, a chemical reaction takes place that produces electricity, Lee said.
The prototype battery produced about 1.5 volts, the same as a standard AA battery, and runs for about 90 minutes. Researchers said the power, voltage, and lifetime of the battery can be improved by adjusting the geometry and materials used."
This is the breakthrough by Ki Bang Lee and his colleagues from Singapore's Institute of Bioengineering and Nanotechnology.
Sooner or later, who'd need crude oil?? If the Singaporeans develop the technology even further, we might soon be able to charge our phones, PDAs, or MP3 players through a quick trip to the restroom. No ne…