Dr Ioannis Ieropoulos, of the aforementioned center, stated.

"One product that we can be sure of an unending supply is our own urine..."

"By harnessing this power as urine passes through a cascade of microbial fuel cells (MFCs), we have managed to charge a Samsung mobile phone."

"The beauty of this fuel source is that we are not relying on the erratic nature of the wind or the sun, we are actually re-using waste to create energy."

The CFM is a battery that convert organic substances directly into electricity thanks to the metabolism of living microorganisms. The more they eat, things like urine for example, more electricity produces and for longer periods of time.

A video on this topic.