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Remove the CMOS battery (CR2032)

Follow instructions in this section to remove the CMOS battery (CR2032).

About this task

To avoid potential danger, make sure to read and follow the safety information.

S004
Attention
CAUTION

When replacing the lithium battery, use only Lenovo specified part number or an equivalent type of 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 Installation Guidelines and Safety inspection checklist to make sure that you work safely.

  • Make sure to read the following notes carefully before replacing the CMOS battery in the node.
    • Do not make CMOS battery in contact with any metal surface during the replacement. Any contact with a metal surface, such as the node and chassis side, can cause damages to the battery.
    • When replacing the battery, you must replace it with another CMOS battery of the exact same type (CR2032) made by the same manufacturer.
    • After replacing the battery, make sure to reconfigure the node and reset the system date and time.
    • Dispose of the battery as required by local ordinances or regulations.

Procedure

  1. Make preparations for this task.
    1. Power off the node (see Power off the node); then, disconnect all external cables from the node.
      Note
      If necessary, press the release clip with a flat-head screwdriver to remove an external network cable from the rear of a 2U node.

    2. Remove the node from the chassis (see Remove a node from the chassis); then, carefully lay the node on a flat, static-protective surface, orienting the node with the front toward you.
      Note
      • When removing the node, note the node tray number and make sure to install the node in the same tray from which it was removed. Reinstalling the node into a different tray requires the node to be reconfigured.
      • For safety, make sure to hold the node with both hands when lifting the node.
    3. Remove the top cover (see Remove the top cover).
    4. Disconnect all the cables from the drive backplane; then, remove the drive cage assembly from the node and place it on a flat, static-protective surface (see Remove the drive cage assembly).
    5. Locate the CMOS battery socket on the system board.
      Figure 1. Location of the CMOS battery socket
      Location of the CMOS battery socket
  2. Remove the CMOS battery from the node.
    1. Gently push the battery socket clip backward to release the CMOS battery.
    2. Carefully take the battery out of the socket.
    Attention

    Avoid using excessive force on the CMOS battery, as it might damage the socket on the system board and result in system board replacement.

    Figure 2. Removal of the CMOS battery
    CMOS battery removal

After you finish

  1. Install a replacement unit (see Install a CMOS battery (CR2032)).
  2. Dispose of the CMOS battery as required by local ordinances or regulations.

Demo video

Watch the procedure on YouTube