“British scientists on Tuesday reported they had harnessed the power of urine and were able to charge a mobile phone with enough electricity to send texts and surf the Internet. The team grew bacteria on carbon fibre anodes and placed them inside ceramic cylinders. The bacteria broke down chemicals in urine passed through the cylinders, building up a small amount of electrical charge which was stored on a capacitor.”
http://www.rawstory.com/rs/2013/07/16/british-scientists-use-urine-to-charge-cell-phone/
