1. What is Battery Capacity?

Battery capacity is a measure of the charge stored in a battery, typically measured in ampere-hours (Ah). It indicates how much energy a battery can deliver at a specific voltage over time.

2. How Does the Calculator Work?

The calculator uses the capacity formula:

Where:

• \( Energy \) — Battery energy in watt-hours (Wh)
• \( Voltage \) — Battery voltage in volts (V)

Explanation: The formula converts energy (Wh) to capacity (Ah) by dividing by the battery's operating voltage.

3. Importance of Capacity Calculation

Details: Knowing battery capacity is essential for determining how long a battery will last under specific loads and for comparing different battery systems.

4. Using the Calculator

Tips: Enter energy in watt-hours (Wh) and voltage in volts (V). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Wh and Ah?
A: Watt-hours measure energy (power × time), while ampere-hours measure charge (current × time). They're related by voltage (Wh = Ah × V).

Q2: Why is voltage important in capacity calculation?
A: Voltage determines how much energy each ampere-hour of charge contains. Higher voltage means more energy per Ah.

Q3: Can I use this for any battery type?
A: Yes, this calculation works for any battery chemistry (Li-ion, lead-acid, etc.) as long as you know the energy and voltage.

Q4: How accurate is this calculation?
A: It's mathematically precise for the given inputs, but actual battery performance depends on temperature, discharge rate, and age.

Q5: What's a typical capacity for consumer batteries?
A: Smartphone batteries: 2-5 Ah (3.7V), Laptop batteries: 4-10 Ah (11.1V), Car batteries: 40-100 Ah (12V).