IMPORTANT UPDATE: Thanks to the help of a Phd battery expert, I have massive improvements now to the cell. These are available here: http://www.noonco.com/edison/
Now back to our regular description: This video shows how to construct an experimental Edison Battery.
These remarkable batteries were developed by Edison in 1901, and many of his batteries more than 70 years old were still producing full capacity.
I'm working on a web page to back up this video with more details.