Battery Health Formula:
From: | To: |
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.
The calculator uses the battery health formula:
Where:
Explanation: The formula calculates the percentage of remaining capacity compared to the battery's original specifications.
Details: Regular battery health monitoring helps determine when a battery needs replacement, prevents unexpected shutdowns, and maintains optimal device performance.
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.
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.