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How to make a Salt Water Battery Lamp.

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Description

Salt water battery + Joule thief circuit.

Materials : Copper plate, Aluminum Foil, Kitchen Towel, Warm Salt water, Joule thief circuit
Bigger copper plate & Aluminum Foil is more powerful.
This battery lamp turned on one hour.. but if you replace salt water, it will be lasting until the foil almost erode.

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