1. What is the mAh Calculation?

The mAh (milliamp-hour) calculation estimates battery capacity based on energy in watt-hours and voltage. It helps compare batteries with different voltages by converting to a common capacity unit.

2. How Does the Calculator Work?

The calculator uses the mAh formula:

Where:

• \( Watt\text{-}Hours \) — Energy capacity of the battery (Wh)
• \( Volts \) — Voltage of the battery (V)
• 1000 — Conversion factor from amp-hours to milliamp-hours

Explanation: The equation converts energy capacity (watt-hours) to charge capacity (mAh) by accounting for the battery's voltage.

3. Importance of mAh Calculation

Details: Knowing the mAh rating helps compare battery capacities, estimate runtime, and ensure compatibility with devices that specify current requirements in mA.

4. Using the Calculator

Tips: Enter watt-hours (usually printed on the battery) and voltage (also printed on battery). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why convert watt-hours to mAh?
A: Many devices specify current draw in mA, so mAh helps estimate runtime more directly than watt-hours.

Q2: What's the difference between mAh and Wh?
A: mAh measures charge capacity, while Wh measures energy capacity. Wh accounts for voltage differences when comparing batteries.

Q3: Can I use this for any battery type?
A: Yes, it works for Li-ion, NiMH, lead-acid, etc., as long as you know the watt-hour rating and voltage.

Q4: How accurate is this calculation?
A: It's mathematically precise, but actual battery performance depends on discharge rate, temperature, and age.

Q5: Why multiply by 1000?
A: To convert from amp-hours (Ah) to milliamp-hours (mAh), since 1 Ah = 1000 mAh.