Lamp powered by 300 live apples, 2012

Portland, Maine-based photographer Caleb Charland (whom we featured before) has a fascinating new series of science-based photos that show various alternative batteries created using things like apple trees and stacked coins. The photo above shows an experiment in which he powered a lamp using 300 apples in a Newburgh, Maine-orchard.

He spent 11 hours sticking zinc-coated galvanized nails and bare copper wires into the apples in order to generate current using the fruit. Every 10 apples provide about 5 volts. The lamp was successfully lit by the apple power, but was so dim that the photograph required a 4 hour exposure!
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