How to Check Battery Capacity on a Windows Laptop

On the other hand, you can’t seem to locate that simply information on Windows 7.

Here’s how you find out your battery capacity information on Windows without having to default to third party battery management programs. 

Open a Command Prompt Windows with Administrative Permission (Start -> type ‘cmd’ -> right click, then run as administrator)
Type without quotes “powercfg -energy”

Wait 60 seconds, and then head down to C:\Windows\system32\energy-report.html, drag the energy-report.html to desktop, and open the file via an Internet browser. 

Scroll down all the way to the bottom, and you will see a section for battery information:

ex. Battery:Battery Information

Battery ID 11121SANYOAS07A31
Manufacturer SANYO
Serial Number 11121
Chemistry LION
Long Term 1
Design Capacity 48840
Last Full Charge

41214

The amount of battery life left can be calculated by

41214/48840*100, which is 84.38% battery capacity left. 

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