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Battery Conversion Formula:
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The mAh (milliamp-hour) to Wh (watt-hour) conversion is used to calculate the energy capacity of batteries. While mAh represents the charge capacity, Wh represents the actual energy capacity, which is more useful for comparing batteries with different voltages.
The calculator uses the conversion formula:
Where:
Explanation: This formula converts the charge capacity (mAh) to energy capacity (Wh) by accounting for the battery's voltage.
Details: Converting mAh to Wh is important for accurately comparing batteries with different voltages, estimating device runtime, and understanding true energy capacity for various applications.
Tips: Enter the battery's mAh rating and nominal voltage. Both values must be positive numbers. The calculator will provide the energy capacity in watt-hours.
Q1: Why convert mAh to Wh?
A: Wh provides a more accurate comparison between batteries with different voltages, as it represents actual energy capacity rather than just charge capacity.
Q2: What is a typical mAh rating for smartphone batteries?
A: Most modern smartphones have batteries between 3000-5000 mAh with voltages around 3.7-3.85V.
Q3: How does voltage affect battery capacity?
A: Higher voltage batteries with the same mAh rating will store more energy. For example, a 4000mAh 7.4V battery has almost twice the energy of a 4000mAh 3.7V battery.
Q4: Can I use this for all battery types?
A: Yes, this conversion works for lithium-ion, lead-acid, NiMH, and other battery types as long as you know the nominal voltage.
Q5: Why is Wh used for airline battery restrictions?
A: Airlines restrict batteries by Wh because it accurately represents the energy content, which is relevant for safety considerations.