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Potential Difference What is it? Potential difference is also called Voltage. It is the amount of work that must be done to carry a charge from one point to another. Give me an example! Have you ever seen one of those built-in battery testers? They test the potential difference between the two pole or terminals of the battery to see how much power it has to drive current around a circuit. Copyright ©2010, PCS Edventures, Inc. All Rights Reserved.