1. What is the Amp Hour Formula?

The Amp Hour (Ah) formula calculates the capacity of a battery by multiplying the current (in amperes) by the time (in hours) that the current flows. It's a fundamental measurement for battery capacity and performance.

2. How Does the Calculator Work?

The calculator uses the Amp Hour equation:

Where:

• \( Ah \) — Amp hours (battery capacity)
• \( I \) — Current in amperes (A)
• \( t \) — Time in hours (h)

Explanation: The equation shows that battery capacity is directly proportional to both the current draw and the duration of that current flow.

3. Importance of Amp Hour Calculation

Details: Amp hour rating helps determine how long a battery will last under a specific load, which is crucial for designing electrical systems and selecting appropriate batteries for applications.

4. Using the Calculator

Tips: Enter current in amperes and time in hours. Both values must be positive numbers. The calculator will compute the total amp hours.

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 (Ah × voltage).

Q2: How does temperature affect battery capacity?
A: Capacity typically decreases in cold temperatures and may increase slightly in moderate warmth.

Q3: What is C-rate in batteries?
A: C-rate describes charge/discharge current relative to battery capacity (1C = current equal to Ah rating).

Q4: Does this formula work for all battery types?
A: The basic formula applies to all batteries, but actual capacity may vary by chemistry (Li-ion, lead-acid, etc.).

Q5: How accurate is this calculation for real-world use?
A: It provides theoretical capacity; actual runtime may differ due to efficiency losses, age, and discharge rates.