does anyone have instructions, diagrams how to make an low voltage electric battery out of dung,salt and used batteries?

I saw this video India with Sanjeev Bhaskar: Indian Inventors & Cow Dung , I am doing an article about light in developing countries and this is a perfect solution

lemonie8 years ago
I think that the energy comes from oxidation of the zinc battery cases. Essentially the original electrolyte is expired and they've just replaced it. I'd suggest taking ordinary D-cells, and extracting the black-stuff (ammonium chloride & manganese dioxide). Then replace it with soggy-dung. (I believe they are using Zinc-carbon rather than alkaline cells) L