1. What is Battery Health Percentage?

Battery Health Percentage is a measure of your laptop battery's current capacity compared to its original maximum capacity. It indicates how much your battery has degraded over time and how much runtime you can expect compared to when the battery was new.

2. How Does the Calculator Work?

The calculator uses a simple formula:

Where:

• \( Current \) — Current battery capacity in mAh (milliampere-hours)
• \( Max \) — Original maximum battery capacity in mAh

Explanation: The formula calculates what percentage of the original capacity your battery still holds. A new battery typically starts at 100% and gradually decreases with charge cycles and age.

3. Importance of Battery Health Monitoring

Details: Regularly monitoring battery health helps you understand when your battery might need replacement, prevents unexpected shutdowns, and maintains optimal laptop performance. Most manufacturers recommend replacing batteries when health drops below 80%.

4. Using the Calculator

Tips: Enter both current and maximum capacity values in mAh (milliampere-hours). You can usually find these values in your laptop's battery information settings or by using system diagnostic tools. Current capacity should always be less than or equal to maximum capacity.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find my battery's current and maximum capacity?
A: On Windows, use command prompt with "powercfg /batteryreport". On macOS, go to Apple menu > About This Mac > System Report > Power. On Linux, check "/sys/class/power_supply/BAT0/" directory.

Q2: What is a good battery health percentage?
A: Above 80% is considered good. Between 60-80% indicates moderate wear. Below 60% suggests significant degradation and likely need for replacement.

Q3: How often should I check my battery health?
A: For regular users, checking every 3-6 months is sufficient. Heavy users or those noticing reduced battery life should check monthly.

Q4: Can I improve my battery health?
A: While you can't reverse degradation, you can slow it by avoiding extreme temperatures, not consistently draining to 0%, and keeping charge between 20-80% for daily use.

Q5: When should I replace my laptop battery?
A: Consider replacement when health drops below 80% or when your battery no longer holds sufficient charge for your needs, even if the percentage is higher.