1. What is LiFePO4 Battery Capacity?

Capacity (Ah) is a measure of how much energy a LiFePO4 battery can store. It's calculated by dividing the battery's energy in watt-hours (Wh) by its nominal voltage (V). This helps determine how long the battery can power a device.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Wh \) — Energy in watt-hours
• \( V \) — Nominal voltage (typically 3.2V for LiFePO4 cells)

Explanation: The formula converts energy (Wh) to capacity (Ah) by accounting for the battery's operating voltage.

3. Importance of Capacity Calculation

Details: Knowing the battery capacity is essential for sizing battery banks, estimating runtime, and comparing different battery systems.

4. Using the Calculator

Tips: Enter the battery's watt-hour rating (usually specified by manufacturer) and nominal voltage (3.2V for single LiFePO4 cell). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the nominal voltage of LiFePO4?
A: The nominal voltage is typically 3.2V per cell, though actual voltage ranges from 2.5V to 3.65V during operation.

Q2: How does this differ from lead-acid battery calculations?
A: Lead-acid batteries have different nominal voltages (2V per cell) and discharge characteristics, requiring different calculations.

Q3: Can I use this for battery packs?
A: Yes, but use the total pack Wh rating and the pack's nominal voltage (cell voltage × number of cells in series).

Q4: Why is capacity important?
A: Capacity determines how long your battery can power devices before needing recharge.

Q5: How accurate is this calculation?
A: It provides theoretical capacity. Actual capacity may vary based on temperature, discharge rate, and battery age.