1. What is Battery Capacity?

Battery capacity is a measure of the charge stored in a battery, typically measured in ampere-hours (Ah). For laptop batteries, it's often calculated from the energy rating (Wh) and voltage (V) printed on the battery.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Wh \) — Energy in watt-hours (found on battery label)
• \( V \) — Voltage in volts (found on battery label)

Explanation: This formula converts the energy capacity (Wh) to charge capacity (Ah) by accounting for the battery's operating voltage.

3. Importance of Battery Capacity Calculation

Details: Knowing your battery's actual capacity helps compare different batteries, estimate runtime, and determine when a battery needs replacement due to capacity degradation.

4. Using the Calculator

Tips: Enter the watt-hours (Wh) and voltage (V) values exactly as printed on your laptop battery. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Where do I find Wh and V values?
A: These are typically printed on the battery label. Wh may be listed as "watt-hours" or "Wh", and V as "volts" or "V".

Q2: What's a typical laptop battery capacity?
A: Most laptop batteries range between 30-100 Wh with capacities of 2,000-6,000 mAh (2-6 Ah) at typical voltages of 10.8V-14.8V.

Q3: Why calculate Ah when Wh is given?
A: Ah gives a more intuitive sense of capacity and allows comparison between batteries of different voltages.

Q4: How does capacity relate to battery life?
A: Higher capacity generally means longer runtime, but actual battery life also depends on your laptop's power consumption.

Q5: Can I use this for other battery types?
A: Yes, this formula works for any battery where you know the energy (Wh) and voltage (V), including power banks and electric vehicle batteries.