1. What is Battery Capacity?

Battery capacity, measured in amp-hours (Ah), represents the amount of electric charge a battery can deliver at the rated voltage. It's a crucial specification for determining how long a battery can power a device.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Energy \) — Total energy in watt-hours (Wh)
• \( Voltage \) — Battery voltage in volts (V)

Explanation: The formula converts energy capacity (Wh) to charge capacity (Ah) by dividing by the operating voltage.

3. Importance of Amp-Hour Calculation

Details: Knowing a battery's amp-hour rating helps determine runtime for devices, compare battery performance, and select appropriate batteries for specific applications.

4. Using the Calculator

Tips: Enter energy in watt-hours and voltage in volts. Both values must be positive numbers. For example, a 100Wh battery at 12V would be 8.33Ah.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Wh and Ah?
A: Watt-hours measure energy capacity, while amp-hours measure charge capacity. Wh accounts for both voltage and current over time.

Q2: How do I convert Ah to Wh?
A: Multiply Ah by voltage (V). For example, 5Ah × 12V = 60Wh.

Q3: Why is voltage important in capacity calculations?
A: Different battery types operate at different voltages, so comparing only Ah without considering voltage can be misleading.

Q4: What's a typical Ah rating for car batteries?
A: Car batteries typically range from 40Ah to 100Ah, with most around 50-70Ah at 12V.

Q5: How does temperature affect battery capacity?
A: Capacity generally decreases in cold temperatures and may increase slightly in warm temperatures (though heat can reduce battery lifespan).