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How to Make a Homemade Battery. Four Methods: Making a Soda-powered Battery Making a Saltwater-powered Battery Making 14-cell Water-powered Battery Making a Hand-powered Battery Community Q&A. To make your own battery at home, all you need is two different types of metal, some lead wires, and a conductive material. Many household items can be used as the conductive material into which you place your metals â for example, saltwater, a lemon, or even dirt.
The electrons flowing through the wire form a current which can be used to power a small light or clock. The truth is, you could use cardboard soaked in salt water as easily as a potato (and some early batteries were made this way.) The energy comes, not from the potato, but from the chemical energy as the electron breaks down into ions.