[VTenigma]

Yes, it can generate an electric current

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So can a potato.

[Openurmind]

Yes, it can generate an electric current.

“So can a potato.”

You can shove a copper cathode and a graphite or zinc anode in the dirt about an inch apart out in your yard, wet it with some water, and get almost 2 volts. Works best in high alkali soils of course.