Battery Life Calculator

The Formula

The formula for calculating battery life is:

\[Battery Life (hours) = \frac{Battery Capacity (mAh)}{Current Draw (mA)}\]

Where:

• Battery Life: The estimated runtime of the battery (in hours)
• Battery Capacity: The total charge the battery can hold (in milliamp-hours, mAh)
• Current Draw: The rate at which current is being drawn from the battery (in milliamps, mA)

Calculation Steps

1. Identify the battery capacity (mAh) and current draw (mA)
2. Insert these values into the formula:
3. Battery Life = Battery Capacity ÷ Current Draw
4. Perform the division to get the result in hours

Example Calculation

Let's calculate the battery life for a 2000 mAh battery with a current draw of 500 mA:

\[Battery Life = \frac{2000 mAh}{500 mA} = 4 hours\]

Visual Representation

This visual shows a fully charged battery with its estimated life of 4 hours based on our example calculation.