Home Back

Battery Health Calculator

Battery Health Formula:

\[ Health = \frac{Current\ Capacity}{Original\ Capacity} \times 100 \]

mAh
mAh

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is Battery Health Calculation?

Battery health calculation measures the current capacity of a battery compared to its original design capacity. It provides a percentage value that indicates how much the battery has degraded over time and usage.

2. How Does the Calculator Work?

The calculator uses the battery health formula:

\[ Health = \frac{Current\ Capacity}{Original\ Capacity} \times 100 \]

Where:

Explanation: The formula calculates the percentage of remaining capacity compared to the battery's original specifications.

3. Importance of Battery Health Monitoring

Details: Regular battery health monitoring helps determine when a battery needs replacement, prevents unexpected shutdowns, and maintains optimal device performance.

4. Using the Calculator

Tips: Enter both current and original capacity values in mAh (milliampere-hours). Both values must be positive numbers with current capacity typically being less than or equal to original capacity.

5. Frequently Asked Questions (FAQ)

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

Q2: How often should I check battery health?
A: For regular monitoring, checking every 3-6 months is sufficient for most devices.

Q3: Can battery health improve over time?
A: No, battery health typically decreases over time and usage due to chemical degradation.

Q4: What factors affect battery health?
A: Charge cycles, temperature extremes, overcharging, and deep discharges all affect battery health.

Q5: When should I replace my battery?
A: Consider replacement when battery health drops below 80% or when you notice significantly reduced runtime.

Battery Health Calculator© - All Rights Reserved 2025