1. What is Battery Capacity?

Battery capacity is a measure of the charge stored in a battery, typically measured in ampere-hours (Ah). For 11.1V lithium ion batteries, this calculator converts watt-hours (Wh) to capacity in Ah.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• \( Wh \) — Watt-hours (energy capacity)
• \( 11.1V \) — Nominal voltage of lithium ion battery

Explanation: The equation converts energy capacity (Wh) to charge capacity (Ah) by dividing by the battery's nominal voltage.

3. Importance of Capacity Calculation

Details: Knowing the battery capacity in Ah helps in designing power systems, estimating runtime, and comparing different battery specifications.

4. Using the Calculator

Tips: Enter the watt-hour rating (Wh) from your battery specifications. The result will be the capacity in ampere-hours (Ah) for an 11.1V lithium ion battery.

5. Frequently Asked Questions (FAQ)

Q1: Why 11.1V specifically?
A: 11.1V is the nominal voltage of a 3-cell lithium ion battery pack (3 × 3.7V).

Q2: Can I use this for other battery voltages?
A: No, this calculator is specifically for 11.1V batteries. For other voltages, use the formula with the correct nominal voltage.

Q3: What's typical capacity for 11.1V batteries?
A: Common capacities range from 2Ah (22Wh) to 6Ah (66Wh) for consumer electronics batteries.

Q4: How accurate is this calculation?
A: It's mathematically exact for converting Wh to Ah at 11.1V, but actual battery performance may vary based on temperature, age, and load conditions.

Q5: Where do I find the Wh rating?
A: Check the battery label or specifications - it's often printed alongside the mAh or Ah rating.