Skip to main content

Remove the CMOS battery

Use this information to remove the CMOS battery.

About this task

To avoid possible danger, read and follow the following safety statement.
  • S004
    Attention
    CAUTION

    When replacing the lithium battery, use only Lenovo specified part number or an equivalent type battery recommended by the manufacturer. If your system has a module containing a lithium battery, replace it only with the same module type made by the same manufacturer. The battery contains lithium and can explode if not properly used, handled, or disposed of.

    Do not:
    • Throw or immerse into water
    • Heat to more than 100°C (212°F)
    • Repair or disassemble

    Dispose of the battery as required by local ordinances or regulations.

  • S005
    Attention
    CAUTION
    The battery is a lithium ion battery. To avoid possible explosion, do not burn the battery. Exchange it only with the approved part. Recycle or discard the battery as instructed by local regulations.
Attention
  • Read the following sections to ensure that you work safely.
  • Turn off the corresponding DWC tray that you are going to perform the task on.
    Note
    If Shared I/O adapters are installed, power off the auxiliary node (node 1/3/5/7/9/11) first, and then power off the primary node (node 2/4/6/8/10/12).
  • Disconnect all external cables from the enclosure.
    Note
    Use extra forces to disconnect QSFP cables if they are connected to the solution.

  • The following notes describe information that you must consider when replacing the battery.

    • Lenovo has designed this product with your safety in mind. The lithium battery must be handled correctly to avoid possible danger. If you replace the battery, you must adhere to the following instructions.
    • If you replace the original lithium battery with a heavy-metal battery or a battery with heavy-metal components, be aware of the following environmental consideration. Batteries and accumulators that contain heavy metals must not be disposed of with normal domestic waste. They will be taken back free of charge by the manufacturer, distributor, or representative, to be recycled or disposed of in a proper manner.

    • After you replace the battery, you must reconfigure the solution and reset the system date and time.

Figure 1. CMOS battery location
CMOS battery location
Table 1. CMOS battery location
1 CMOS battery 

Procedure

  1. Make preparations for this task.
    1. Remove the tray (see Remove a DWC tray from the enclosure).
      Attention

      For safety, use the lift tool to remove the tray from the rack.

    2. Remove the tray cover (see Remove the tray cover).
    3. Remove the PCIe riser-cage assembly (see Remove a PCIe riser assembly).
  2. Remove the CMOS battery:
    Figure 2. CMOS battery removal
    CMOS battery removal
    1. Pivot the battery toward the middle of the compute node.
    2. Lift the battery from the socket.
      Attention
      Do not lift the battery by using excessive force. Failing to remove the battery properly may damage the socket on the system board. Any damage to the socket may require replacing the system board.
  3. Dispose of the CMOS battery as required by local ordinances or regulations.
After you finish

If you are instructed to return the component or optional device, follow all packaging instructions, and use any packaging materials for shipping that are supplied to you.

Demo video

Watch the procedure on YouTube