1. What is Amp-Hours (Ah)?

Amp-hours (Ah) is a unit of electric charge that measures battery capacity. It represents how much current a battery can supply at a specific voltage for one hour before being depleted.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Ah \) — Amp-hours (battery capacity)
• \( Wh \) — Watt-hours (energy capacity)
• \( V \) — Voltage (battery nominal voltage)

Explanation: The formula converts energy capacity (watt-hours) to charge capacity (amp-hours) by accounting for the battery's operating voltage.

3. Importance of Battery Capacity Calculation

Details: Knowing a battery's amp-hour rating helps determine how long it can power a device, compare different batteries, and design electrical systems.

4. Using the Calculator

Tips: Enter the battery's watt-hour rating (often printed on the battery) and its nominal voltage (e.g., 12V for car batteries). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Ah and Wh?
A: Ah measures charge capacity, while Wh measures energy capacity. Wh accounts for voltage differences when comparing batteries.

Q2: How do I find my battery's Wh rating?
A: It's often printed on the battery. If not, multiply Ah by voltage (Wh = Ah × V).

Q3: Why is voltage important in this calculation?
A: Higher voltage batteries store more energy per amp-hour. A 12V 100Ah battery stores more energy than a 6V 100Ah battery.

Q4: Can I use this for lithium-ion batteries?
A: Yes, the formula works for all battery chemistries as long as you know the correct nominal voltage.

Q5: How accurate is this calculation?
A: It provides theoretical capacity. Real-world capacity may vary due to temperature, discharge rate, and battery age.