1. What is Battery Health Percentage?

Battery health percentage indicates how much capacity your battery can hold compared to its original design capacity. It's a key metric for understanding your laptop battery's condition and remaining lifespan.

2. How Does the Calculator Work?

The calculator uses the battery health equation:

Where:

• \( Measured\ Capacity \) — Current maximum capacity of your battery (mAh)
• \( Nominal\ Capacity \) — Original design capacity of your battery (mAh)

Explanation: The equation compares your battery's current maximum charge capacity with its original capacity when new.

3. Importance of Battery Health Monitoring

Details: Regular battery health checks help predict remaining battery life, identify when replacement is needed, and maintain optimal performance.

4. Using the Calculator

Tips: Enter both measured and nominal capacities in mAh (milliampere-hours). These values can typically be found in your laptop's battery information or system diagnostics.

5. Frequently Asked Questions (FAQ)

Q1: What is a good battery health percentage?
A: 80-100% is excellent, 60-80% is fair, below 60% means you should consider replacing the battery soon.

Q2: How often should I check my battery health?
A: Every 3-6 months is recommended for regular monitoring.

Q3: Where can I find my battery's measured capacity?
A: On Windows, use powercfg /batteryreport command. On Mac, check System Information under Power.

Q4: Why does battery health decrease over time?
A: Due to chemical aging, charge cycles, temperature exposure, and usage patterns.

Q5: Can I improve my battery health?
A: You can slow degradation by avoiding extreme temperatures, not keeping it fully charged for long periods, and reducing deep discharges.