1. What is Battery Health?

Battery health represents the remaining capacity of your laptop battery compared to its original capacity when new. It's expressed as a percentage and indicates how much your battery has degraded over time.

2. How Battery Health is Calculated

The calculator uses the following equation:

Where:

• \( Current\ Capacity \) — The current maximum charge your battery can hold (mAh)
• \( Original\ Capacity \) — The battery's original maximum charge when new (mAh)

Explanation: This calculation compares your battery's current maximum charge to its original specification to determine how much capacity has been lost.

3. Importance of Battery Health

Details: Monitoring battery health helps determine when to replace your battery. Below 80% health, you may notice significantly reduced runtime. Below 60%, replacement is typically recommended.

4. Using the Calculator

Tips: Enter both capacities in milliampere-hours (mAh). The original capacity can usually be found on the battery label or in laptop specifications. Current capacity can be checked through system diagnostics or battery reporting tools.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find my battery's current capacity?
A: On Windows, use powercfg /batteryreport command. On macOS, check System Information under Power. Linux users can check /sys/class/power_supply/BAT0/ files.

Q2: What's considered good battery health?
A: 80-100% is excellent, 60-80% is fair but may need replacement soon, below 60% typically requires replacement.

Q3: How often should I check battery health?
A: Every 3-6 months for regular monitoring, or when you notice significantly reduced battery life.

Q4: Can battery health improve?
A: No, battery health only degrades over time. Calibration may show small temporary improvements in reporting.

Q5: Does fast charging affect battery health?
A: Yes, frequent fast charging and high temperatures can accelerate battery degradation.