In Windows 7, I typically hide all the system tray icons, including the battery meter of the laptop. These are information which I want to see when I want to and not constantly hog the display and my attention. So, if the battery meter is hidden away inside the system tray, how to see the battery meter when I want to without using the mouse?
There does not seem to be any keyboard shortcut for the battery meter. However, Windows 7 has a super-useful Windows Mobility Center dialog that is enabled on laptops. It displays the battery meter and a few other statuses.
The keyboard shortcut to bring up this dialog is
Win+X to dismiss the dialog once you have noted your battery level.