Summary

this is a scale model of the baghdad battery. they found around 20 of these near bagdad. they are very old.

follow the link here for an acurate description
http://en.wikipedia.org/wiki/Baghdad_Battery

and my youtube video of it here. with voltage measurements on a scope
https://www.youtube.com/watch?v=LaAzrUVLQeA

Instructions

the 2mm wall is the best to print. i also gave you thicker walls.

also there is one stl with no bottem, it has a flange on the opening and needs to be printed upside down. then i put tape on the bottem and poured some fiberglass resin into it. then swirl it around and coat the inside with resin. when dry, you can put liquids inside without harming the plastic.

electrodes are
5/16 iron rod, galvenized and 160mm long
3/4 copper pipe, wich is 22mm OD and 95mm long, you will need to connect a small wire to the copper tube

the vase is roughly 150mm high and 95mm round.

the spacers for the electrodes are a tight push fit.

the cap is a loose fit into the jar and the center hole is left small so you can drill it out to a good fit for either 5/16 or 8mm rod. also drill a hole for the wire from the copper tube

Baghdad Battery Replica