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HP ProLiant BL620c G7 Server series - Removing and Replacing the BBWC Battery Module


This document is provided to assist in removing and replacing the BBWC battery module for the HP ProLiant BL620c G7 Server series.


Minimum skill level

The End User requires no hardware-specific training to replace the defective part. The End user should have familiarity with system hardware and software requiring repair.


Tools required

  • T15 Screwdriver

  • T10 Screwdriver

  • T6 Screwdriver


Parts required

NOTE: Part numbers are subject to change.

The replacement part number will vary depending on the BBWC battery module that is being replaced. If a part is listed as "Yes" under "Requires Return" then the defective part needs to be returned to HP. Click here for more information on returning parts to HP .

Part Number
Requires Return
Battery module - For Battery Backed Write Cache (BBWC)
462976-001 (Modified)
NOTE: For customers in countries/regions with RoHS legislation* (e.g. EU, China, etc.) restricting the use of hazardous substances in electrical equipment. The use of the Original Spare part is regulated by RoHS legislation. If your unit contains a part that is labeled with the Modified Spare number, the Modified Spare must be ordered as the replacement part. If your unit contains a part that is labeled with the Original Spare number, please order the Original Spare as the replacement part. In this case either the Original Spare or the Modified Spare may be shipped which will not affect performance or functionality of the unit.


Summary of instructions

To view a video demonstrating the procedure for removing the BBWC battery module, click on the link below. Or use the product video listing on the HP Services Media Library, ( Click here to go to HP Service Media Library ) then select BBWC battery module from the menu on the upper left hand side of the screen.

Click here to view the BBWC battery module removal video (right-click on the link to open in a new window/tab).

BBWC battery module removal

  1. Review the safety considerations before performing the steps listed below by clicking on the following link:

    Click here to view the precautions .

    CAUTION: Failure to comply with the precautions could result in damage to your product or loss of data.
    • To prevent a server blade malfunction or damage to the equipment, do not add or remove the battery pack while an array capacity expansion, RAID level migration, or stripe size migration is in progress.
    • After the server blade is powered down, wait 15 seconds and then check the amber LED before unplugging the cable from the cache module. If the amber LED blinks after 15 seconds, do not remove the cable from the cache module. The cache module is backing up data, and data is lost if the cable is detached.

    Remove the access panel. Click here for instructions on how to remove the access panel .

  3. Disconnect the cable.

  4. Slide the pack up and out of the DIMM baffle.

BBWC battery module replacement

  1. NOTE: The battery pack might have a low charge when installed. In this case, a POST error message is displayed when the server blade is powered up, indicating that the battery pack is temporarily disabled. No action is necessary on your part. The internal circuitry automatically recharges the batteries and enables the battery pack. This process might take up to four hours. During this time, the cache module functions properly, but without the performance advantage of the battery pack.

    Slide the pack and insert it into the DIMM baffle.

  2. Connect the cable.

  3. Replace the access panel. Click here for instructions on how to replace the access panel .


Parts return

If your part requires return then click on the appropriate link below:

Click here for the defective parts return procedure for US .

Click here for the defective parts return procedure for Europe .


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