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Compare the Design Capacity with the Full Charge Capacity.

Go to the Installed Battery section it will be near the top. You’ll know you’ve opened the correct file because it’ll say Battery Report at the top. You’ll need to go to C:\Users (username here) \battery-report.html. You’re going to find the file as an HTML file on your C drive. Once it’s open, type the following command: powercfg /battery report. You can also search for the Command Prompt in the Windows Start menu. To open the Command Prompt, you’ll need to type cmd in the search bar. Use the Command Prompt to Get the Windows 11 Battery Information Let’s see how you can get that battery report. Using the Command Prompt, you can get the information to see if your battery needs maintenance. I'd rather just put that money toward a new Core M laptop or something.You can get a battery report from your Windows 11 computer to see how the battery is doing. I can get a 7800 mAh (87 Wh) 9-cell battery that fits, but not surprisingly it costs twice as much, and again who knows how accurate that info is. Also, the OEM batteries essentially don't exist anymore, but even if they did, this battery is still over 80% of the original capacity, if the Windows 10 battery report is accurate. So, if the battery report is accurate, I won't buy one of those batteries because it seems pointless, as my current battery is still almost 90% of one of those higher capacity batteries, and actually higher capacity than the low end models. However ,those are all non-OEM parts so who knows how accurate those numbers are and how good the quality of the cells is. How accurate is this information? I don't think the battery life is very good, but when I went online to look for new batteries, I see that most of the inexpensive replacement parts are 4400 mAh to 5200 mAh, which corresponds to 49 Wh to 58 Wh. It states the battery is a 62160 mWh (62 Wh) 6-cell battery with full charge capacity of 50816 mWh (51) Wh.

From the command prompt in Windows 10 I used powercfg /batteryreport to generate a report of the battery. I have an old laptop with crappy battery life (mainly because of the age of the machine and the tech of the time).