Scientists harness the power of pee
Judy Skatssoon
ABC Science Online
Urine batteries can't power laptops yet, but they could theoretically keep a digital watch working
A urine powered battery the size of a credit card has been invented by Singapore researchers.
A drop of urine generates 1.5 volts, the equivalent of one AA battery, says Dr Ki Bang Lee of the Institute of Bioengineering and Nanotechnology.
He says the technology could provide a disposable power source for electronic diagnostic devices that test urine and other body fluids for diseases like diabetes.
These currently need lithium batteries or external power sources. But with this system, the body fluid being tested could power the unit itself.
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