1. What is Battery Capacity?

Battery capacity is a measure of the charge stored in a battery, typically measured in ampere-hours (Ah). For lithium batteries, it's calculated from the energy content (Wh) and nominal voltage (V).

2. How Does the Calculator Work?

The calculator uses the basic formula:

Where:

• \( Energy \) — Total energy stored in watt-hours (Wh)
• \( Voltage \) — Nominal voltage of the battery (V)

Explanation: This simple conversion allows you to determine how much current the battery can deliver over time.

3. Importance of Capacity Calculation

Details: Knowing your battery's capacity helps in sizing battery systems, estimating runtime, and comparing different battery options.

4. Using the Calculator

Tips: Enter energy in watt-hours and voltage in volts. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Wh and Ah?
A: Watt-hours measure energy (power × time), while ampere-hours measure charge (current × time). They're related through voltage.

Q2: What is nominal voltage for lithium batteries?
A: Common nominal voltages are 3.7V (single cell), 7.4V (2S), 11.1V (3S), etc. Check your battery specifications.

Q3: Can I use this for other battery types?
A: The formula works for any battery type, but nominal voltage differs (e.g., 12V for lead-acid).

Q4: Why is capacity important?
A: It determines how long your device can run before needing recharge.

Q5: How accurate is this calculation?
A: It's theoretically accurate, but real-world capacity may vary due to temperature, age, and discharge rate.