The Japanese company Aqua Power manufactures batteries in various sizes that are using almost any type of liquid as a catalyst. In this case: urine. The liquids cause a reaction between the aluminium and magnesium resulting in a reload of the battery. Various liquids, such as water, coke, beer and even urine (the one liquid you have always handy) can be used.
The Non Pollution Power batteries are brand named NoPoPo, as the batteries are eco-friendly, not using lead, cadmium or any other fossil combustible.