Video recorded in 2007.

When two different types of conductors are pushed into a potato chemical reactions take place charging them up - we have a simple electrochemical cell.  A potato, zinc screw and carbon rod produce about 1V.  We experiment joining a few of these cells up in series and then in parallel circuits to increase the total voltages and currents.  With these batteries we power various electrical devices.
 

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Potato Battery



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