1. What is the Battery Capacity Formula?

The battery capacity formula calculates the total charge a battery can deliver at a specific current over time. It represents the integral of current over time and is typically measured in Ampere-hours (Ah).

2. How Does the Calculator Work?

The calculator uses the battery capacity equation:

Where:

• \( Current \) — Electric current in Amperes (A)
• \( Time \) — Duration in hours (h)
• \( Capacity \) — Result in Ampere-hours (Ah)

Explanation: For constant current, the capacity is simply the product of current and time. For variable current, integration is required.

3. Importance of Battery Capacity Calculation

Details: Knowing battery capacity is essential for designing power systems, estimating runtime, and selecting appropriate batteries for specific applications.

4. Using the Calculator

Tips: Enter current in Amperes and 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 (Ampere-hours) measures charge capacity, while Wh (Watt-hours) measures energy capacity (Ah × Voltage).

Q2: How does temperature affect battery capacity?
A: Capacity typically decreases at lower temperatures and may increase slightly at moderate higher temperatures.

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

Q4: How accurate is this simple calculation?
A: It works well for constant current. For variable current, integration of current over time is needed.

Q5: What factors reduce actual battery capacity?
A: Age, charge cycles, temperature extremes, and high discharge rates can all reduce effective capacity.