1. What is Battery Ah?

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

2. How Does the Calculator Work?

The calculator uses the basic Ah formula:

Where:

• \( Current \) — Current in amperes (A)
• \( Time \) — Time in hours (h)

Explanation: This simple multiplication gives the battery's capacity in amp-hours, which helps determine how long a battery can power a device.

3. Importance of Ah Calculation

Details: Knowing a battery's Ah rating helps in selecting the right battery for applications, estimating runtime, and comparing battery capacities.

4. Using the Calculator

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

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). Wh accounts for voltage differences between battery types.

Q2: How does temperature affect battery Ah?
A: Cold temperatures reduce effective capacity, while high temperatures can increase capacity but may shorten battery life.

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: Do all batteries list Ah ratings?
A: No, small batteries often use mAh (milliamp-hours), while automotive batteries use CCA (Cold Cranking Amps) for starting power.

Q5: How accurate is the Ah rating?
A: Actual capacity varies with discharge rate (Peukert effect), temperature, age, and battery chemistry.