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HP Notebook PCs - Checking the Status of the Battery

This document pertains to HP Notebook PCs with Windows 7 and Vista.

HP Battery Check is a utility in HP Support Assistant that provides a simple but accurate test of the battery.

The maximum capacity of all batteries decreases with time and use. Loss of battery capacity varies with product configuration and usage, including but not limited to product model, applications running, power management settings, and product features. The battery warranty covers defects in materials or workmanship that result in failure; it does not cover natural deterioration of battery capacity. To determine if a battery has had a warrantied failure, you may need to run additional diagnostics.

To get the latest version of the HP Battery Check, download and install HP Support Assistant for Windows 7 and Vista.

NOTE: When installing or upgrading HP Support Assistant, the Battery Check option in the Power, Thermal, and Mechanical window may not appear. HP Support Assistant must run at least once to activate the program.

To resolve this issue, complete the following steps.

  1. Select Maintain and click Refresh .

  2. Exit HP Support Assistant.

  3. Restart HP Support Assistant

Check the battery status

To prepare your computer for checking the battery status, turn off the PC and connect it to the AC adapter. The notebook PC must be on AC power in order for HP Battery Check to function properly. The PC should be allowed to charge for approximately 30 - 60 minutes before trying to run the HP Battery Check utility.

If you plug in your AC adapter and immediately run the HP Battery Check, you may get a false failure showing the battery is bad. If the battery is in a low charge state (at less than 3%) you may also get a false reading.

Follow the steps below to check the battery using HP Support Assistant.

  1. Click Start and select HP Support Assistant .

  2. On the HP Support Assistant window, select Troubleshoot , and then select Power, Thermal, and Mechanical .

    Figure 1: Launch Battery Check from HP Support Assistant

  3. Click Battery Check to examine your battery and display the results of your battery status check.

    Figure 2: HP Battery Check, showing "Status: OK" for the battery

    A Status: OK message indicates the battery is operating and functioning as designed and within specification. However, if additional computer operating time is desired, the power management settings can be adjusted or another battery may be purchased. No further action is required for this status.

    Figure 3: HP Battery Check, showing "Status: Replace" for the battery

    A Status: Replace message indicates the battery has either reached the end of its useful life or has encountered a failure and should be replaced.

    Figure 4: HP Battery Check, showing "Status: Replace" with Under Warranty Failure ID for the battery

    If the notebook and battery age is under one year, a 24-character Failure ID is displayed below the Status: Replace explanation. Contact HP and provide the 24-character Failure ID for a battery replacement under warranty.

    Figure 5: HP Battery Check, showing "Status: Replace" with Out-of-Warranty Failure ID for the battery

    If the battery is older than 1 year and was warranted for 1 year, Failure ID: REOOW is displayed below the Status: Replace explanation. Therefore the battery is out-of-warranty. A replacement battery may be purchased by clicking Click here to purchase a replacement battery , through www.hp.com , or from a HP Authorized Service Provider.

    Figure 6: HP Battery Check, showing "Status: Calibrate" and "Status: No Battery"

    A Status: Calibrate message indicates that the battery is functioning correctly but needs to be calibrated. HP Battery Check provides instructions based on the battery it detects.

    A Status: No Battery message indicates that no battery was detected during the test. A battery may be purchased by clicking Click here to purchase a replacement battery , through www.hp.com , or from a HP Authorized Service Provider.

    Other battery states (not shown)

    A Failure ID: REOOW-L message indicates that the battery is older than 1 year and is also a Long Life battery. Further investigation is required to determine the warranty status of battery under test. Please contact HP or a HP Authorized Service Provider to request a replacement battery.

    A Status: Unknown message indicates that an error was encountered while trying to access the battery under test. Please re-insert the battery and the AC Adapter to retest the battery.

The current state of the battery (charging or discharging) is displayed.

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