1. What is the Battery Capacity Formula?

The battery capacity formula calculates the ampere-hour (Ah) rating of a battery by dividing the energy content in watt-hours (Wh) by the battery voltage in volts (V). This helps determine how much charge a battery can hold.

2. How Does the Calculator Work?

The calculator uses the battery capacity equation:

Where:

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

Explanation: The equation converts energy storage from watt-hours to ampere-hours, which is a more common rating for battery capacity.

3. Importance of Battery Capacity Calculation

Details: Knowing a battery's capacity is essential for determining how long it can power a device, sizing battery banks for applications, and comparing different battery technologies.

4. Using the Calculator

Tips: Enter energy in watt-hours and voltage in volts. Both values must be positive numbers. Typical battery voltages are 3.7V (Li-ion), 12V (lead-acid), etc.

5. Frequently Asked Questions (FAQ)

Q1: Why convert Wh to Ah?
A: Ah is a more intuitive measure for battery capacity as it relates directly to current draw over time.

Q2: What's the difference between Ah and Wh?
A: Ah measures charge capacity, while Wh measures energy capacity (accounting for voltage).

Q3: Can I use this for any battery type?
A: Yes, the formula works for all battery chemistries (Li-ion, lead-acid, NiMH, etc.).

Q4: How accurate is this calculation?
A: It's mathematically precise, but actual battery performance may vary due to temperature, age, and discharge rate.

Q5: What if I only know mAh?
A: Convert mAh to Ah by dividing by 1000, then multiply by voltage to get Wh.