1. What is Battery Health?

Battery health represents the current capacity of your battery compared to its original design capacity. It indicates how much your battery has degraded over time and how much charge it can hold compared to when it was new.

2. How Does the Calculator Work?

The calculator uses the battery health formula:

Where:

• Current Capacity — Measured in milliwatt-hours (mWh), obtained from BatteryInfoView software
• Design Capacity — Original capacity in milliwatt-hours (mWh), obtained from battery specifications or BatteryInfoView

Explanation: The formula calculates what percentage of the original capacity your battery can still hold.

3. Importance of Battery Health

Details: Monitoring battery health helps determine when a battery might need replacement. Batteries typically need replacement when health drops below 80%.

4. Using the Calculator

Tips: Enter both current and design capacities in mWh (milliwatt-hours). Current capacity should be equal to or less than design capacity.

5. Frequently Asked Questions (FAQ)

Q1: What is BatteryInfoView?
A: BatteryInfoView is a utility that displays detailed information about your laptop battery, including current capacity and design capacity.

Q2: What is a good battery health percentage?
A: New batteries start at 100%. Below 80% is considered significantly degraded, and replacement may be needed.

Q3: How often should I check battery health?
A: For regular monitoring, check every 3-6 months. More frequently if you notice rapid battery drain.

Q4: Can battery health improve over time?
A: No, battery health only degrades over time and usage. Some calibration might show minor fluctuations.

Q5: Where can I find these values on my computer?
A: Use BatteryInfoView software or check system reports (on Mac: About This Mac > System Report > Power).