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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.
A battery is a sandwich. It has two metal ends and some acid/chemical stuff in the middle. The metal ends must be made of different metals. For example, one end might be copper and the other end might be zinc. The acid starts to eat away at the metal ends and they sort of start to rust.