1. What is Amp-hour (Ah)?

Amp-hour (Ah) is a unit of electric charge commonly used to measure battery capacity. It represents the amount of charge a battery can deliver at a specific current over time.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Current \) — Discharge current in Amperes (A)
• \( Time \) — Discharge time in hours (h)

Explanation: The formula calculates the total charge capacity by multiplying the discharge current by the time the battery can sustain that current.

3. Importance of Ah Calculation

Details: Knowing a battery's Ah rating helps determine how long it will last under specific loads, essential for designing power systems and selecting appropriate batteries for applications.

4. Using the Calculator

Tips: Enter the discharge current in Amps and the discharge time 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 Watt-hours (Wh) measures energy capacity (Ah × Voltage). Wh accounts for voltage differences between battery types.

Q2: How does temperature affect Ah rating?
A: Battery capacity typically decreases in cold temperatures and may increase slightly in moderate warmth (within manufacturer specifications).

Q3: What is C-rate in batteries?
A: C-rate indicates charge/discharge current relative to capacity. 1C means discharging at current equal to Ah rating (e.g., 2A for 2Ah battery).

Q4: Does higher Ah always mean better?
A: Higher Ah means longer runtime but typically results in larger/heavier batteries. The "best" depends on application requirements.

Q5: How accurate is this calculation?
A: This provides theoretical capacity. Real-world capacity varies with discharge rate, age, temperature, and battery chemistry.