The lifespan the battery of a laptop is limited. Microsoft Windows 7 gives you the opportunity to examine the battery of your laptop to know its current capacity and efficiency potential of maximum load without using any third party software.
At the same time it will provide you with a detailed report of the power management in Microsoft Windows 7.
Type “Powercfg-energy” (without the quotation marks) and hit enter:
Type exit in the command prompt and hit enter to close the console.