When we last looked at pee powered batteries, they were still experimental; now they are on the shelves in AA and AAA sizes in Japan. It can be recharged with a variety of liquids including urine and other precious bodily fluids, is supposed to last 10 years, and pumps out 500 milliamp-hours (mAh), which is equivalent to zinc-carbon batteries but a third of what an alkaline does.
Labels: batteries, Japan, renewable energy, treehugger