This document pertains to HP and Compaq Notebook PCs with Windows 7. 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 article, two methods of testing and calibrating the battery are explained. Also, a manual method for calibrating the battery is presented. Testing and Calibrating the battery using HP System Diagnostics (preferred method) To test the battery using the HP System Diagnostics, start with the computer off and unplugged from the power. Use the following instructions to test the battery: Unplug the power cord and turn off the computer. Press the power button to turn on the computer. Press the Esc key immediately when seeing the HP or the Compaq logo screen. The Start Up menu appears. Press F2 to select F2 System Diagnostics . Select Battery Test from the list of diagnostic tests. NOTE:If your battery is fully charged, the battery test screen might not appear. Plug in the power cord. Click Start Battery Test on the Battery Test page. The Battery Test page shows Test in progress and the Estimated Time Remaining. When the test completes, one of the messages and suggested actions from the following table displays: Status Message Suggested action OK The battery is functioning properly The battery does not need calibration. Read the remainder of the message for more information. Calibrate The battery is functioning correctly, but it needs to be calibrated. Read and respond to the message that appears. If the option to use the HP battery auto calibration feature displays, this is preferred. Otherwise, click Learn How to Calibrate your Battery for the steps to calibrate your battery. NOTE:Battery calibration might take several hours to complete and is best performed during long periods when the computer is not in use. Weak or Very Weak The battery is functioning correctly, but due to normal aging of the battery, the battery life between charges is now significantly shorter than when it was new. The battery should be replaced to get the most working time out of your battery. If your computer is within its warranty period, you can Contact HP (in English) to verify if your battery is covered under the warranty. Replace The battery is reporting a failure and needs to be replaced as soon as possible. Replace the battery. If your computer is within its warranty period, you can Contact HP (in English) to verify if your battery is covered. No Battery A battery is not detected. A battery is not installed or detected in the battery compartment. If a battery is installed, remove the battery and inspect the pins to see if there is dirt or other foreign matter blocking the connection. Fully insert a battery into the compartment if a battery was not inserted and you want to test the battery in that compartment. Unknown HP Battery Check was unable to access the battery. Remove and reinsert the battery. You might need to download and install all the updates from HP Support Assistant.
Posted on: Sat, 17 Aug 2013 01:02:50 +0000
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