The calculation of battery life typically depends on several factors: the battery's capacity, load current, and the device's operating conditions. A common battery life estimation formula is:

Battery Life (hours)=Battery Capacity (mAh)/Device Power Consumption (mA)

Where:

• Battery Capacity (mAh) represents the amount of charge the battery can store, usually provided in the battery's specifications.
• Device Power Consumption (mA) refers to the current the device consumes under normal working conditions, which typically depends on the device's operating mode and load.

If the battery is measured in other units, such as Watt-hours (Wh), the formula may need to be adjusted accordingly:

Battery Life (hours)=Battery Capacity(Wh)/Device Power  Consumption (W)

However, note that this is a rough estimate, and the actual battery life may be affected by factors such as temperature, usage patterns, and battery aging.

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