The electric energy content of a battery expressed in “Watt hours”.
A battery’s capacity is the amount of electric charge it can deliver at the rated voltage. The more electrode material contained in the cell the greater its capacity. A small cell has less capacity than a larger cell with the same chemistry, although they develop the same open-circuit voltage.
Capacity is measured in units such as amp-hour (A·h).
Batteries with the same output voltage also use “Ampere hours” for comparing capacities.
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