It is known that the charge-discharge amount in a battery is 500-1000 on average. After that, the battery gradually begins to lose its capacity. Unfortunately, it is not possible to prevent the aging of the battery, but sometimes a laptop can become discharged due to the use of “heavy” applications.
However, there is a quick way to check the health of your laptop battery. To do this, first hold down the WIN and R keys, then type cmd in the command line and simultaneously press the Ctrl, Shift, Enter keys.
It can also be launched via the command line Start menu or search (see below).
After you get a black window enter powercfg energy into it. Then press Enter.
Then the system will analyze power saving errors for a while. The report can be viewed in the energy-report.html file. Simply copy and paste the link highlighted in red below into your browser.
This report contains data on the estimated capacity and last full charge of the battery, among many other information. If these numbers match, your battery is good. If not, then it’s starting to wear out.
To calculate wear in percent, you need to know the base battery capacity (specified by the manufacturer) and the value of the last full charge. For example, the first number is 5000, the second is 45510. So you need to do: (50000 – 45510)/50000 = 0.0898*100 = 8.98. Rounding will result in 9%.
Additional battery health information can also be obtained by typing powercfg /batteryreport on the command line.
Source: Ferra
