I keep hearing about mAh and mWh. What do these things mean and why do they matter?
Battery capacity is measured as a product of the battery’s current and time rating and is often represented as amp hours (ah) or milliamp hours (mAh). However, this measurement omits a valuable gauge of battery performance: voltage. To address this, battery functionality is often measured in milliwatt hours (mWh), which is the product of mAh and voltage. This approach provides a more informative and precise measurement of the amount of energy contained in the battery and the battery’s ability to deliver that energy to a product. This is often necessary to analyze and compare today’s differentiated battery market. From a practical perspective, this means that because NiZn delivers greater mWh capacity, it is able to provide optimal performance over a larger portion of the system discharge. This correlates to not only more shots or flashes per charge, but also more responsive electronic performance. In the case of a digital camera this translates into quicker flash recharging and process
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