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HP Customer Support - Knowledge Base

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HP Notebook PCs - Testing and Calibrating the Battery (Windows)

This document is for HP Notebook PCs.
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 document 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.
note:
If you notice your notebook battery is swollen or deformed, go to Swelling or Deformation of Notebook Battery for more information.
Depending on which version of Windows or Diagnostics you are using, the information and graphics in this document might vary slightly.

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