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Batteries come in many shapes and sizes. Some are no larger than a pill while others are heavy and huge size, but most batteries have one thing in common. They store chemical energy and change it into electrical energy. The cell is the basic unit producing electricity. A battery has 2 or more cells, but people often use the world battery when talking about a single cell, too, like a dry cell. One of the most popular batteries that have a cell is a dime sized battery which we use for watches. Cells force electrons to flow along conductors.(DK Science 150).
"The electrical force of a cell or battery is called its electromotive force (emf). This force, which makes electrons flow around a circuit, is measured in units called volts (v). Each king of cell has a particular emf. A dry cell, for example, has an emf of 1.5volts." (DK science 150)
The other way to measure a battery is by how much current it can provide. Current is used to measure how many electrons flow through the cell......

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Approximate Pages: 6 (250 words per double-spaced page)

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