1. What is Battery Health?

Battery health percentage indicates how much capacity your battery can hold compared to when it was new. 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 formula:

Where:

• Current Capacity — Measured capacity of your battery now (mAh)
• Design Capacity — Original capacity when the battery was new (mAh)

Explanation: The formula compares your battery's current maximum charge capacity to its original capacity to determine how much it has degraded.

3. Importance of Battery Health

Details: Monitoring battery health helps predict when you might need a replacement, explains reduced battery life, and can indicate if your battery is failing prematurely.

4. Using the Calculator

Tips: Enter both current and design capacities in milliamp-hours (mAh). These values can typically be found in your operating system's battery report or third-party battery monitoring tools.

5. Frequently Asked Questions (FAQ)

Q1: What's 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 sufficient for most users, or whenever you notice significantly reduced battery life.

Q3: Where can I find my battery capacity values?
A: On Windows, use "powercfg /batteryreport"; on macOS, check "System Information"; Linux users can check "/sys/class/power_supply/BAT0/".

Q4: Can I improve my battery health?
A: Avoid extreme temperatures, don't keep it at 100% charge for long periods, and minimize full discharge cycles.

Q5: Is 0% battery health dangerous?
A: Batteries at 0% health won't hold charge and should be replaced, as they may swell or become unstable.