1. What is Wh Calculation?

Wh (watt-hours) calculation converts milliamp-hours (mAh) to watt-hours using voltage. This is important for comparing battery energy capacity across different voltages.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( mAh \) — Milliamp-hours (battery capacity)
• \( V \) — Voltage (battery voltage)
• 1000 — Conversion factor from milliamp-hours to amp-hours

Explanation: The formula converts electrical charge (mAh) to energy (Wh) by multiplying by voltage and dividing by 1000 to account for the milli prefix.

3. Importance of Wh Calculation

Details: Wh provides a standardized measure of energy capacity that allows comparison between batteries of different voltages, which is essential for selecting appropriate power sources and understanding true energy capacity.

4. Using the Calculator

Tips: Enter mAh value (must be greater than 0) and voltage value (must be greater than 0). The calculator will compute the watt-hours.

5. Frequently Asked Questions (FAQ)

Q1: Why convert mAh to Wh?
A: Wh provides a more accurate comparison of energy capacity between batteries with different voltages, as it accounts for both charge and voltage.

Q2: What is a typical Wh value for smartphone batteries?
A: Most smartphone batteries range from 10-20 Wh, though this varies by device and battery capacity.

Q3: Can I use this for any battery type?
A: Yes, this formula works for lithium-ion, lead-acid, NiMH, and other battery types as long as you know the mAh rating and voltage.

Q4: Why divide by 1000?
A: The division by 1000 converts milliamp-hours to amp-hours, as 1 Ah = 1000 mAh.

Q5: How accurate is this calculation?
A: The calculation is mathematically precise. However, actual battery performance may vary due to factors like temperature, age, and discharge rate.