Battery Amp Hour Capacity Calculator

Battery Capacity Formula:

\[ Capacity\ (Ah) = \int Current\ (A)\ dt \]

Battery Capacity:

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1. What is Battery Amp Hour Capacity?

Amp-hour (Ah) is a unit of electric charge that represents a battery's capacity. It indicates how much current a battery can supply over a specific time period (1 Ah = 1 amp for 1 hour).

2. How Does the Calculator Work?

The calculator uses the simple formula:

\[ Capacity\ (Ah) = Current\ (A) \times Time\ (hours) \]

Where:

\( Current \) — Electric current in amperes (A)
\( Time \) — Duration in hours (h)

Explanation: This calculates the total charge capacity by integrating current over time.

3. Importance of Capacity Calculation

Details: Knowing a battery's capacity helps determine how long it can power a device, compare different batteries, and design power systems.

4. Using the Calculator

Tips: Enter current in amps and time duration in hours. 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 (Watt-hours) measures energy capacity (Ah × Voltage).

Q2: How does discharge rate affect capacity?
A: Higher discharge rates often reduce effective capacity (Peukert effect).

Q3: What's a typical car battery capacity?
A: Most car batteries range between 40-100 Ah.

Q4: How to estimate battery life?
A: Divide capacity by average current draw (e.g., 50Ah battery with 5A load ≈ 10 hours).

Q5: Does temperature affect capacity?
A: Yes, capacity typically decreases in cold temperatures.