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Remove a CMOS battery (CR2032)

Follow instructions in this section to remove a CMOS battery.

About this task

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

  • S002
    disconnect all power
    CAUTION
    The power-control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.
  • 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.

  • Remove the shipping bracket or security bezel, if applicable (see Configuration guide); then, power off the server and disconnect the power cords (see Power off the server).

  • Remove the node from the enclosure or node sleeve, if applicable (see Configuration guide); then, carefully lay the node on a flat, static-protective surface.

  • Consider the following information when replacing a CMOS battery:
    • Lenovo has designed this product with user safety in mind. The lithium battery must be handled correctly to avoid potential danger. Make sure to follow instructions in this topic while replacing the battery.
    • The CMOS battery must be replaced with another unit of the same type (CR2032).
    • For high temperature operation environment, it is recommended to use CR2032HR instead.
    • After replacement is completed, it is required to reconfigure the server 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. If applicable, unlock or remove any locking device that secures the top cover, such as a Kensington lock; then, remove the top cover (see Remove the top cover).
    2. Locate the CMOS battery slots on the system board and identify the battery to be removed.
      Figure 1. Locations of CMOS battery slots
      CMOS battery location
      1 3V system battery
      2 3V security battery
      Note

      If the 3V security battery is replaced, the system enters System Lockdown Mode and needs to be activated or unlocked. See Activate or unlock the system.

  2. Remove the CMOS battery from the socket.
    1. Gently press the clip in the direction as shown.
    2. Carefully tilt and lift the CMOS battery out of the socket.
      Attention
      • Avoid 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 a CMOS battery
      CMOS battery removal

After this task is completed

　

Demo video

Watch the procedure on YouTube