Comments on: pee-battery2 http://blogs.washplus.org/innovation/2013/12/bill-gates-funds-a-smartphone-battery-that-runs-on-human-urine/pee-battery2/ Good ideas get better when shared! Fri, 20 Nov 2015 12:09:27 +0000 hourly 1 https://wordpress.org/?v=4.4.4