1. What is iPhone Battery Health Percentage?

The iPhone Battery Health Percentage indicates how much capacity your battery can hold compared to when it was new. It helps determine if your battery is performing optimally or needs replacement.

2. How Does the Calculator Work?

The calculator uses the battery health formula:

Where:

• \( \text{Battery Maximum Capacity} \) — Current maximum capacity of your iPhone battery (mAh)
• \( \text{Original Capacity} \) — Original battery capacity when new (mAh)

Explanation: The formula compares your battery's current maximum capacity to its original capacity to determine the percentage of remaining health.

3. Importance of Battery Health Monitoring

Details: Monitoring battery health helps identify when your battery needs replacement, prevents unexpected shutdowns, and maintains optimal device performance.

4. Using the Calculator

Tips: Enter both the current maximum capacity and original capacity in milliamp-hours (mAh). Both values must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find my iPhone's battery capacity?
A: Go to Settings > Battery > Battery Health on iOS 11.3 or later. For exact values, use third-party apps like CoconutBattery or iMazing.

Q2: What is a good battery health percentage?
A: 100% is new, 80-100% is good, below 80% may need replacement for optimal performance.

Q3: How often should I check battery health?
A: Monthly checks are sufficient for most users, or when you notice reduced performance.

Q4: Does fast charging affect battery health?
A: Yes, frequent fast charging can accelerate battery degradation over time.

Q5: When should I replace my iPhone battery?
A: Consider replacement when health drops below 80% or you experience significant performance issues.