1. What is Battery Health?

Battery health is a measure of a battery's current capacity compared to its original rated capacity. It indicates how much the battery has degraded over time and its remaining useful life.

2. How Does the Calculator Work?

The calculator uses the battery health equation:

Where:

• \( Actual\ Capacity \) — Current capacity of the battery (mAh)
• \( Rated\ Capacity \) — Original capacity when new (mAh)

Explanation: The equation calculates the percentage of original capacity that the battery can still hold.

3. Importance of Battery Health Calculation

Details: Monitoring battery health helps determine when to replace batteries, optimize device performance, and prevent unexpected power failures.

4. Using the Calculator

Tips: Enter both actual and rated capacity in milliamp-hours (mAh). Both values must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is a good battery health percentage?
A: Above 80% is generally considered good. Below 60% may indicate the battery needs replacement.

Q2: How often should I check battery health?
A: For frequently used devices, check every 3-6 months. For critical applications, monitor more frequently.

Q3: What causes battery health to degrade?
A: Charge cycles, extreme temperatures, overcharging, and aging all contribute to capacity loss.

Q4: Can battery health improve over time?
A: No, battery health only degrades over time. Temporary improvements may indicate calibration issues.

Q5: Is this calculation accurate for all battery types?
A: This works best for lithium-ion batteries. Other chemistries may require different calculations.