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  • 3 years later...

With the battery capacity and average current consumption, you can compute the expected runtime of your project by solving the equation:

Battery capacity (in mAh) / Average current consumption (in mA) = Hours of expected runtime

For example if your project consumes 150 mA and your batteries are rated at 800 mAh at that current draw, you can can compute:

800 mAh / 150 mA = 5.33 hours expected runtime

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