Over time, the laptop battery starts to perform worse. Its capacity decreases, and other characteristics deteriorate. How do you know if it's time to replace your battery with a new one? To determine the state of the battery, we do not need anything except the standard powercfg Windows program.
Necessary
Windows laptop
Instructions
Step 1
Run the cmd program as administrator. In Windows 7, find cmd in the start menu and right-click to run as administrator.
In Windows 8, on the Start screen, start typing cmd into search. And when the program is found, right-click on its tile.
Step 2
We launch the program with the key: powercfg / energy and wait 60 seconds. The generated powercfg report will be placed in the system directory, like C: / Windows / System32. Open the usual Explorer, find this folder and copy the energy-report.html file from it to the Desktop.
Step 3
Let's analyze the energy-report.html file. The most important part for us is entitled Battery: Battery Information. The remaining life is affected by the Last Full Charge. It must be compared with the calculated capacity. A deviation of 10-15% is normal. If it is more, then this indicates a gradual aging of the battery. A deviation of 50% or more indicates that it is time to change the battery.
