1. What is Battery Capacity?

Battery capacity is a measure of the charge stored by the battery and is typically measured in ampere-hours (Ah). It represents the amount of electric charge a battery can deliver at the rated voltage.

2. How Does the Calculator Work?

The calculator uses the battery capacity formula:

Where:

• \( \text{Total Energy} \) — Energy stored in the battery (Watt-hours)
• \( \text{Voltage} \) — Battery voltage (Volts)

Explanation: This formula converts energy in watt-hours to capacity in ampere-hours by dividing by the battery voltage.

3. Importance of Battery Capacity Calculation

Details: Calculating battery capacity is essential for designing power systems, determining runtime for devices, selecting appropriate batteries for applications, and understanding energy storage capabilities.

4. Using the Calculator

Tips: Enter total energy in watt-hours (Wh) and voltage in volts (V). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Wh and Ah?
A: Watt-hours (Wh) measure energy, while ampere-hours (Ah) measure charge capacity. Wh takes voltage into account, making it a more accurate measure of total energy storage.

Q2: Can I use this for all battery types?
A: Yes, this formula works for all battery types (Li-ion, Lead-acid, NiMH, etc.) as it's a fundamental electrical conversion.

Q3: Why is voltage important in capacity calculation?
A: Different battery chemistries operate at different voltages. The same physical size battery can store different amounts of energy depending on its voltage.

Q4: How accurate is this calculation?
A: This provides a theoretical maximum capacity. Actual usable capacity may be less due to discharge rates, temperature, and battery age.

Q5: What's the relationship between Ah and runtime?
A: Runtime (hours) = Battery Capacity (Ah) / Load Current (A). Higher Ah rating generally means longer runtime at the same current draw.