1. What is Battery Capacity?

Battery capacity is a measure of the charge stored in a battery, typically measured in amp-hours (Ah). It indicates how much current a battery can provide over a specified time period.

2. How Does the Calculator Work?

The calculator uses the battery capacity formula:

Where:

• \( Power \) — Electrical power consumption in watts (W)
• \( Time \) — Duration of operation in hours (h)
• \( Voltage \) — Battery voltage in volts (V)

Explanation: The formula converts power consumption into battery capacity by accounting for the voltage at which the battery operates.

3. Importance of Battery Capacity Calculation

Details: Calculating battery capacity is essential for designing power systems, determining runtime of devices, and selecting appropriate batteries for specific applications.

4. Using the Calculator

Tips: Enter power in watts, time in hours, and voltage in volts. All values must be positive numbers.

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. Wh = Ah × V.

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

Q3: What is C-rate in batteries?
A: C-rate indicates the charge/discharge current relative to battery capacity (1C = full capacity in 1 hour).

Q4: Should I oversize my battery capacity?
A: Generally yes, as batteries perform best when not regularly discharged below 20-30% of capacity.

Q5: How accurate is this calculation?
A: It provides theoretical capacity. Real-world capacity may vary due to efficiency losses, age, and temperature.