1. What is Battery Capacity?

Battery capacity is a measure of the energy stored in a battery, typically expressed in watt-hours (Wh) or amp-hours (Ah). This calculator converts amp-hour rating to wattage by factoring in the battery voltage.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Ah \) — Amp-hours (how much current a battery can provide over time)
• \( V \) — Voltage (electrical potential difference)

Explanation: Multiplying amp-hours by voltage converts the capacity to watt-hours, which represents the total energy storage capacity.

3. Importance of Battery Capacity Calculation

Details: Knowing a battery's capacity in watts helps determine how long it can power devices, compare different battery systems, and properly size battery banks for applications.

4. Using the Calculator

Tips: Enter the battery's amp-hour (Ah) rating and nominal voltage (V). Common voltages include 12V for car batteries, 3.7V for lithium-ion cells, etc.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Ah and Wh?
A: Amp-hours (Ah) measure charge capacity, while watt-hours (Wh) measure energy capacity. Wh accounts for voltage differences between battery systems.

Q2: How do I convert back to amp-hours?
A: Divide watt-hours by voltage: \( Ah = Wh / V \)

Q3: Why is voltage important in capacity calculations?
A: Two batteries with the same Ah rating but different voltages will store different amounts of total energy.

Q4: What's a typical capacity for car batteries?
A: A standard car battery might be 50Ah at 12V = 600Wh capacity.

Q5: Does temperature affect battery capacity?
A: Yes, capacity typically decreases in cold temperatures and may increase slightly in warm temperatures.