Making a battery from an aluminum can to run two bright LEDs using a joule thief

German supermarkets are now selling Pfandfrei beverage cans meaning no deposit, no We thought those days of nonrecycling incentives were long behind us Anyway, this may be beneficial to some of us look for dumped aluminum cans and turn them into batteries to run bright LEDs using nothing more than stainless steel scouring pads, paper towels and tap water with a capful of drain cleaner poured inside. Couple that with a joule thief and you have a battery that will last a long long time (