1. What is Battery Health Percentage?

Battery Health Percentage is a measure of a battery's current capacity compared to its original capacity when new. It indicates how much the battery has degraded over time and helps predict remaining useful life.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Current Capacity \) — The battery's current maximum charge capacity (mAh)
• \( Original Capacity \) — The battery's original maximum charge capacity when new (mAh)

Explanation: The formula compares the current maximum charge the battery can hold against its original specification to determine how much capacity has been lost.

3. Importance of Battery Health

Details: Monitoring battery health helps determine when to replace batteries, optimize charging habits, and understand device performance limitations. Most manufacturers recommend replacement when health drops below 80%.

4. Using the Calculator

Tips: Enter both current and original capacities in milliamp-hours (mAh). Current capacity can often be found in battery diagnostics or monitoring apps, while original capacity is specified by the manufacturer.

5. Frequently Asked Questions (FAQ)

Q1: What is a good battery health percentage?
A: Above 80% is generally considered good. Below 80%, you may notice reduced performance and battery life.

Q2: How often should I check battery health?
A: For frequently used devices, checking every 3-6 months is reasonable to monitor degradation trends.

Q3: Can battery health improve over time?
A: No, battery health only degrades over time and usage. Temporary fluctuations may occur but the overall trend is downward.

Q4: Why does my battery health decrease faster sometimes?
A: Factors like high temperatures, deep discharges, fast charging, and heavy usage can accelerate battery degradation.

Q5: Is 85% battery health good for a 2-year-old phone?
A: Yes, that's within normal range. Typical lithium-ion batteries lose about 15-20% capacity per year with regular use.