by mrdovie » Sat Jan 30, 2010 8:16 pm
Hi, I posted a water battery today that uses aluminum foil and either stainless steel or silver plated wire (called memory wire) but not the neat wire that snaps back to a learned curve when heated, it is for making bracelets. The problem is internal resistance of these cells can be a meg ohm or so. Try other electrolites (fluids) and metals instead of making parallel cells, you can make bigger multi-layer cells. The foil is good for this. Google the "pee battery" they get quite a bit of power from that, like a AA battery. You can remove the nickel screen from a DEAD 3 volt lithium battery, make sure it's dead and have a bowl of water there to throw the parts and your fingers in if it leaks on you, wear eye protection, too. I use a pair of small wire cutters to pry open the seal and peal it like opening a can. I think the screen is carbon coated and I've got over a volt with 1mA current. Some LEDs don't use much power. You could charge a large 1000mF capacitor and get a burst of power that will rebuild over time. This stuff can power a radio or a hearing aid, I don't see a car yet, but at 63, I'd like a car that runs on pee.
Mr Dovie