A team at the University of the West of England in Bristol have managed to produce "small amounts of energy" from a process that steadily feeds Microbial Fuel Cells with wee.
The Fuel Cells contain bacteria, like you find in people who haven't washed their hands, on the floor and everywhere, which feed on the chemically rich wee and anaerobically respire, producing electrons. These electrons pass through an electrode, then -- hey presto! -- enough power to charge a very, very, very small mobile phone.
Dr Ieropoulos, from the University of the West of England, said: "We were able to show that by miniaturisation and multiplication of the number of MFCs into a stack and regulating the flow of urine, it may be possible to look at scales of use that have the potential to produce useful levels of power, for example in a domestic or small village setting." [BBC]
Image credit: Science Daily.