If you’re on Windows 10, the easiest way to do this is to press Win+X and selecting “ Command Prompt” from the pop up menu. Launch Command Prompt by right-clicking in the bottom left-hand corner of the screen and selecting “Command Prompt” OR press Win+R on your keyboard to open the Run Window and type cmd or cmd.exe.How to generate a battery report in Windows If, like me, you’d rather not wait for the Windows-generated notification, you can generate a battery report following a few easy steps. Once your battery gets down to 40 percent of its original capacity (it can only hold 40 percent or less of what the manufacturer specified as the 100 percent capacity when the battery was new), Windows will display a notification that says “ Consider replacing your battery.” I’ve been unable to confirm if this feature was carried over to Windows 8 or Windows 10. Windows 7 will actually tell you when your laptop battery is no longer holding a full charge. But just how much capacity has my laptop’s battery lost, and is it really necessary/worth my while to replace it? If you have other methods to check when to know if the laptop battery went bad and it needs to be replaced, let us know in the comments below.I now travel a lot and my laptop’s limited battery life is becoming an issue. If the Last Full Charge number falls below 50% in relation to the Design Capacity, it is probably the time to replace the laptop battery. So what you want to do here is to plug your laptop in for a good 12 hours, make sure that it is a full charge as possible, take another report and see where is at. one year or two years), you’ll notice that the Last Full Charge number will start decreasing and that essentially is saying that your battery is not lasting as long, or you are not charging it to its full capacity all the time. The higher the Last Full Charge is to the Design Capacity, it means that your battery is doing OK, after a period of time (e.g. There you will see two numbers the Design Capacity and Last Full Charge. We are going to focus in one parameter, look for Battery: Battery Information - scroll down the page and it will be almost at the end –. In the energy report you can find very useful information like: Errors, Warnings and Informational messages, all related to energy. Double-click to open the energy-report.html in your default web browser.Ĥ. This command will initiate a diagnose, observing the system behavior, which it takes about one minute, then it will dump all the information collected to a file named energy-report.html that it will be located in your C drive.ģ. From the Windows Command Prompt type powercfg -energy. Go to Start, in the search box type cmd, right-click it and select Run as Administrator.Ģ. This tool is more commonly used by manufactures and developers to create drivers, but it can be easily used by anyone and it can provide really useful information and more importantly is information that we can use to determine if it time to replace the laptop battery.ġ. Now it also includes a command-line tool called Powercfg that can help you to analyze your system for common energy efficiency and battery life problems. Windows 7 does a great job managing power consumption, preserving and extending battery life, in comparison to previous versions. Yes, there are little things that we can do to try to preserve and extend as much as possible the battery life and save energy, but the time will come when you need to get a battery replacement. If there is one thing that all laptops have in common, no matter which operating system they may be running, is the problem with battery life.
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