Earth battery

Also found in: Wikipedia.
(Physics) a voltaic battery the elements of which are buried in the earth to be acted on by its moisture.

See also: Earth

References in periodicals archive ?
1) Inspired by the idea of permanent free power, I built an earth battery constructed of alternating plates of lead and zinc buried in the topsoil.
Almost 30 years after my earth battery experiment, I thought to revisit the idea.
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