In brief:
There is no way to turn this feature off manually, besides hiding the battery icon altogether.
To do so:
Right-click the battery icon.
Click Turn system icons on or off.
Do any of the following:
Choose Power: off.
Click Customize notification icons.
Uncheck Always show all icons and notifications on the taskbar.
Choose Power: Hide icons and notificaions.
Click OK.
http://superuser.com/questions/429683/windows-tells-me-to-replace-laptop-battery-even-though-it-works-fine