This document pertains to HP and Compaq Notebook PCs with Windows 8.
The maximum capacity of a battery changes over time. Because of this change in battery capacity, the charge level indicator in Windows might not show 100% charged. To know the condition of your battery, use the steps in this article to test your battery and calibrate it if necessary. Calibrating the battery resets the battery gauge to accurately display the charge level in Windows. In this document, two methods of testing and calibrating the battery are explained. Also, a manual method for calibrating the battery is presented.