The existence of batteries has played a significant role in the development of portable computers like laptops and netbooks. If we set aside MacBooks, a standard Windows notebook comes with a battery backup of around 6 to 7 hours on an average. Some of the high-priced ones have enough juice to entertain you for 11 to 12 hours on a single charge.
However, these batteries, mostly lithium-ion type, decrease in capacity over time. It is entirely possible that a new laptop that can run for 6 hours on battery power may provide only 2 hours of juice after a couple of years of usage.
You can’t stop the battery decay process because it’s a natural phenomenon, but you can check battery health on your laptop from time to time. This would help you know when it is the right time to purchase a new one.
Windows 10 (and older versions) keeps an account of battery-related data like its original specifications, designed capacity, current capacity, etc. It also maintains updated information about battery usage sessions. A command-line utility known as POWERCFG allows you to access this data in a well-organized manner.
So, here is a method which involves the use of Windows CMD to check battery health and generate Energy Report. You can also generate the Battery Health Report, which shows the charging cycles and performance of your battery over the course of time.
The energy report in Windows 10 can provide an idea of how much it’s capacity is reduced over time and if there are any errors or wrongly configured settings that hurt the battery life. You can follow these steps to perform a laptop battery life test:
The battery report looks less geeky and includes information about day-to-day battery usage. It displays the recent usage stats and graph for the past three days, battery usage history of how many hours the system was active per week, and per week battery capacity history to provide an idea of how much it has depleted in comparison to the original capacity.
On the basis of observed drains, the laptop battery test report also includes estimated numbers on how long the battery will last. Follow the steps mentioned below to generate your Windows 10 battery report.
Every time you type these commands in the CMD window to check battery health, the existing versions of the energy report and battery report will be refreshed with the latest data.
You can regularly monitor your Windows battery health using the above powercfg command. For instance, it let you keep an eye on the recent as well as long term usage history of your battery. Among other things, the Windows 10 battery report gives battery life estimates that you can get after a full charge. This can be pretty helpful at times when you have a crunch of power supply.
Note: We have tested the above method for Windows 10, 8, 8.1. It will also work on Windows 7.
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