Good
90% or above. Your battery is holding most of its original capacity and should still perform well.
Laptop battery tool
Battery Health Check Laptop
Estimate your laptop battery health with values from your Windows battery report. This tool keeps the math simple and explains whether the result looks healthy, worn, or ready for replacement.
Calculate battery health
Enter both values in mWh. The result compares your current full charge capacity with the battery's original design capacity.
Your battery health result will appear here.
Windows battery report
How to find these values in Windows
Not sure where to find Design Capacity and Full Charge Capacity? Read our guide on how to check laptop battery health on Windows.
- Open Command Prompt. Search for Command Prompt from the Start menu.
-
Run
powercfg /batteryreport. Press Enter and Windows will create a battery report file. - Open the battery report. Copy the file path shown in Command Prompt and open it in your browser.
- Find Design Capacity and Full Charge Capacity. Look under the installed batteries section and enter those mWh values above.
Result guide
What your result means
Moderate
70% to 89%. The battery has noticeable wear, but it may still be fine for normal daily use.
Replace battery
Below 70%. Consider replacement if runtime is short, charging feels unreliable, or the laptop shuts down unexpectedly.
Battery health basics
Battery health compares the full charge capacity your laptop can currently hold against the original design capacity. A lower percentage usually means the battery has worn down through charge cycles, heat, age, or heavy daily use.
If you also want a better sense of how long a laptop battery should last, this guide explains normal battery lifespan and common replacement signs.
If your result looks borderline, the guide on signs your laptop battery needs replacement helps you compare low health with real warning signs. If you are also trying to understand whether age and usage are part of the story, read Battery Cycle Count Explained.
If charging is unreliable at the same time, you may also want to compare symptoms with Laptop Plugged In, Not Charging or the broader Laptop Battery Not Charging guide.
FAQ
How do I find my laptop battery capacity?
On Windows, run a battery report and look for design capacity and full charge capacity under the installed batteries section.
What is a good laptop battery health percentage?
A battery health percentage of 90% or above is usually considered good for everyday use.
Should I replace my battery below 70% health?
Below 70%, replacement is recommended if you notice poor runtime, sudden shutdowns, or slow charging.
Can this tool fix my battery?
No. This tool estimates battery health. It helps you decide whether troubleshooting, calibration, or replacement may be needed.