Do you have a used laptop? Or do you want to buy a used laptop? How to check if laptop battery life? If it’s good or not or needs to be changed! Don’t worry you will know everything in this article We will not install any program just we will use cmd (windows command prompt) By the way there is a video on my channel about this topic you can watch it from this link.
1. How to run command prompt Cmd
We go to the search box near the Windows icon and write cmd then run as administrator
After that write cd.. then press enter to open the command prompt
Now write this command powercfg –energy then press enter this command will run a power energy scan on your computer
Now you will wait 60 seconds to scan your system and battery, after scan is completed you will see this message in the cmd
the main message that you will see is Enabling tracing for 60 seconds… and Observing system behavior… just click enter
after that, you will see that the energy report is ready you can read it from the link.
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2. How to read the report?
The report takes about 60 seconds depending on your system after complete scanning you get a full report about the energy report of your system we just need to check the battery performance You will get this link copy it and paste it to the browser
after you press enter then you will have this page Power Efficiency Diagnostics Report so scroll down to this section
so scroll down to this section Battery: Battery Information
as you see you have the battery ID and serial number and chemistry of the battery so we need to look at the design capacity and last full charge to compare between them
- Design capacity: 47520
- last full Charge: 28306
The design capacity is the max number you will get when charging the battery and the last charge number is the number of the current state of your battery so when the battery is new you will get the same 2 values after you use the battery these numbers ( last full charge )decreases by time so if the last charge number is too low that means that this battery is dead and need to replace if the number is half of design capacity that means it’s about 50% of its life
Finally, I hope my article added some valuable information to you. If you have some questions? Let me know in the comments below. I’ll try my best to answer them.