How do I check my laptop battery health?

On Windows, run powercfg /batteryreport in Command Prompt and open the report to compare full-charge capacity with design capacity. On Mac, open Settings, Battery, Battery Health.

What is a good battery health percentage?

Roughly 80% or more of the original capacity is healthy. Falling well below 80% after normal use is a sign the battery is wearing out.

How many charge cycles is normal?

Most laptop batteries are rated for several hundred to about 1,000 cycles. Noticeable capacity loss after 300–500 cycles is normal.

How to Check Laptop Battery Health (Windows & Mac)

Quick answer: To check laptop battery health, compare its current full-charge capacity to its original design capacity. On Windows, run a battery report from the command line; on Mac, check Battery Health in settings. Below about 80% after a couple of years is normal wear.

For a quick live look at charge level and charging status, open the battery test.

Check battery health on Windows

Open Command Prompt and run powercfg /batteryreport. It saves an HTML file (the path is shown); open it and compare Full Charge Capacity with Design Capacity. The gap is your wear, and the report also shows the cycle count and recent usage.

Check battery health on Mac

Go to System Settings → Battery → Battery Health (or hold Option and click the battery icon on older versions). It shows a status of Normal or Service Recommended, and the cycle count appears in System Information under Power.

What counts as a healthy battery?

Health is the ratio of current capacity to the original design capacity. Around 80%+ is healthy; most batteries reach roughly 80% after a few hundred charge cycles, which is expected wear rather than a fault. Mac laptops are typically rated near 1,000 cycles.

When to replace the battery

Consider a replacement when capacity drops well below 80%, the laptop dies far sooner than it used to, it shuts down suddenly at moderate charge, or the battery is physically swollen — stop using a swollen battery and have it serviced.

Quick live check

The browser battery test shows what your browser reports — charge level and whether you are plugged in — where the device and browser expose it.