1. What is Battery Capacity?

Battery capacity is typically measured in ampere-hours (Ah) and represents the amount of electric charge a battery can deliver at the rated voltage. It's a crucial factor in determining how long a battery can power a device.

2. How Does the Calculator Work?

The calculator uses the basic battery calculation formula:

Where:

• \( Power \) — Device power consumption in watts
• \( Time \) — Desired runtime in hours
• \( Voltage \) — Battery voltage

Explanation: This formula calculates the required battery capacity in ampere-hours needed to power a device for a specified duration.

3. Importance of Battery Calculations

Details: Accurate battery calculations are essential for designing power systems, selecting appropriate batteries for applications, and estimating runtime for electronic devices.

4. Using the Calculator

Tips: Enter the device's power consumption in watts, desired runtime in hours, and battery voltage in volts. All 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. Wh = Ah × V.

Q2: How does battery type affect capacity?
A: Different battery chemistries (Li-ion, lead-acid, etc.) have different energy densities and discharge characteristics.

Q3: What is the 80% rule for batteries?
A: For longest lifespan, it's recommended to use only 80% of a battery's rated capacity before recharging.

Q4: How does temperature affect battery capacity?
A: Capacity typically decreases in cold temperatures and may increase slightly in warm temperatures (though high heat can damage batteries).

Q5: Should I add margin to my calculations?
A: Yes, it's wise to add 20-30% to calculated capacity to account for inefficiencies and capacity degradation over time.