Urine-tricity: recharge your phone with urine

According to Engineering
and Technology Magazine, scientists (Ioannis Ieropoulos and his team)
at the University of West England have for the first time
recharged a smartphone with
urine. They developed a small fuel cell that
converts urine into electricity. Though, scientists have used
microbial fuel cells for
charging a basic mobile phone,
this is the first time they've charged a modern-day
smartphone. This method is economical and resourceful since the fuel
cells are one square inch, cost between 1 and 2 British pounds (about
$1.33 to $2.66). The most interesting part of it is that its produce
electricity using natural
biological processes.

The energy produced by a single fuel cell and 600 mL of urine (about
2.5 cups) is enough for three hours of phone calls on a smartphone.
Ieropoulos and his team term it "Urine-tricity."