This is actually for my own tutorial as i might forget the link of the original tuto.
so credit to : HERE
1. Go to search in the windows. Search cmd
2. Type powercfg /batteryreport and hit enter.
3. This will generate a report called battery-report.html located in the Users\Your Username folder on your C: drive. Open and scroll down to the Battery Information section:
This report will give you a lot of stats, but the one you want to pay the most attention to is the Design Capacity versus the Full Charge Capacity:
And walla ... you can see the battery's report
