Battery Life Calculator
Calculate how long your battery can power a device based on battery capacity (mAh) and current consumption (mA).
Battery supplying power to an electronic device
How This Calculator Works
This calculator estimates how long a battery-powered device can operate before the battery is depleted. Enter the battery capacity in milliamp-hours (mAh) and the device current consumption in milliamps (mA). The runtime is calculated by dividing battery capacity by current consumption.
Example:
Battery Capacity = 5000 mAh
Current Consumption = 250 mA
Runtime = 5000 ÷ 250 = 20 Hours