1. What is Battery Health?

Battery health 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 usage.

2. How Does the Calculator Work?

The calculator uses the battery health equation:

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 equation calculates what percentage of the original capacity the battery can still hold.

3. Importance of Battery Health

Details: Monitoring battery health helps determine when a battery needs replacement, predicts device runtime, and maintains optimal performance.

4. Using the Calculator

Tips: Enter both current and original capacities in milliamp-hours (mAh). Current capacity should be less than or equal to original capacity.

5. Frequently Asked Questions (FAQ)

Q1: What is considered good battery health?
A: Typically 80% or above is considered good. Below 80% may indicate significant degradation.

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

Q3: What causes battery health to decrease?
A: Charge cycles, extreme temperatures, overcharging, and age all contribute to battery degradation.

Q4: Can battery health improve over time?
A: No, battery health only degrades over time and usage. It cannot improve.

Q5: Is 100% battery health possible on an used battery?
A: No, 100% health would mean the battery performs exactly as when new, which is impossible after any usage.