I took a piece of zinc, a piece of copper, and a plastic cup. I attached the zinc and copper to the leads on my voltmeter, put them in the cup (not touching), and filled the cup with water. Lo and Behold, I got about .8 volts! I did the same with 5 more cups connected in series, and I got almost 5 volts. I connected them to a blue LED and got a respectable amount of light - I can read from it. IT has been over 3 weeks now and the batteries are still going strong. I have had to add some water due to evaporation, but the voltage has only dropped a little - I suspect due to the slight filming on the Zinc electrodes.
I have not been able to run an electric motor with this configuration - not enough current, but I suspect a better battery design that maximizes electrode surface area might do the trick.
This is high school science project stuff, but I am fascinated by it.
Thoughts? Ideas?
Rez....
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