In July 2013, scientists at the University of West England (UWE) developed a way of using urine as a power source to generate electricity and created the world’s first MFC (microbial fuel cell) powered mobile phone. Professor Ioannis Ieropoulos said at the time:
‘By harnessing this power as urine passes through a cascade of MFCs, we have managed to charge a Samsung mobile phone.’..So far the microbial fuel power stack that we have developed generates enough power to enable SMS messaging, web browsing and to make a brief phone call.’
However, he said that making a long call on a mobile phone is far more power-hungry. This professor believes that they will get to a place where they can charge a battery for longer periods of time.
Read more about this innovative idea at: http://www.dailymail.co.uk/sciencetech/article-3465946/Never-run-battery-Kyocera-concept-uses-solar-panels-screen-charge-phone-using-sunlight.html#ixzz4BREPS4eN