Alright, as requested, I have decided to include a good little pdf file which will explain the basics of an aluminum-air battery far better than I ever could. It can be used for your experimentation into the matter. You will notice that these fuel cells are very simple to make and can probably be made out of junk lying around your house right now. Another version of this can actually be made out of empty aluminum cans. It was developed as a project to provide cheap energy to third world countries. I think they were calling it the six pack battery or something along those lines. If you have any questions, I will try to answer them as best as I can.