1. What is Battery Health Percentage?

The battery health percentage indicates how much of the original capacity your laptop battery can still hold compared to when it was new. It's a key metric for determining when to replace your battery.

2. How Does the Calculator Work?

The calculator uses the battery health equation:

Where:

• \( Current\ Capacity \) — Current maximum charge capacity of the battery (mAh)
• \( Original\ Capacity \) — Original maximum charge capacity when new (mAh)

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

3. Importance of Battery Health Monitoring

Details: Regular battery health checks help prevent unexpected shutdowns, optimize performance, and determine when to replace the battery before it becomes problematic.

4. Using the Calculator

Tips: Enter both current and original capacity in milliamp-hours (mAh). The current capacity should always be less than or equal to the original capacity. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find my battery's current capacity?
A: On Windows, use powercfg /batteryreport command. On Mac, check System Information under Power section. Many laptops also have built-in battery diagnostics.

Q2: What is a good battery health percentage?
A: Above 80% is considered good. Below 60% may indicate it's time to consider replacement, depending on your usage needs.

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

Q4: Can battery health improve over time?
A: No, battery capacity naturally degrades with use and age. Some calibration might show temporary improvements, but the overall trend is downward.

Q5: Does this calculator work for all battery types?
A: It works for any lithium-ion or lithium-polymer battery where you know both the original and current maximum capacities.