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Remove a CMOS battery (CR2032)

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

About this task

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.
Consider the following when replacing the CMOS battery.
  • Lenovo has designed this product with user safety in mind. The lithium battery must be handled properly 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 CMOS battery as required by local ordinances or regulations.
Attention

Procedure

  1. Make preparation for this task.
    1. If necessary, remove all the WLAN antennas. See Remove the WLAN antennas.
    2. Remove the top cover. See Remove the top cover.
    3. Remove the PMB air baffle. See Remove the PMB air baffle.
    4. Lift the riser assembly from the node. See Remove the riser assembly from the node.
  2. Proceed to the section corresponding to the CMOS battery to be removed:
    Figure 1. CMOS battery locations on the system board

    1 3V system battery2 3V security battery
    Note

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

Remove the system battery​

Procedure
  1. Depending on the configuration, remove the power module board or internal power supply unit. See Remove the power module board (PMB) or Remove the internal power supply unit (AC PMB).
  2. Remove the CMOS battery.
    1. Gently press on the nub on the side of the CMOS battery as illustrated.
    2. Pivot the battery away from the seat to remove it.
    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. Removing the CMOS battery

After this task is completed

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

Remove the security battery​

Procedure
  1. If applicable, remove the wireless adapter. See Remove the wireless adapter.
  2. Remove the CMOS battery.
    1. Gently press on the nub on the side of the CMOS battery as illustrated.
    2. Pivot the battery away from the seat to remove it.
    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 3. Removing the CMOS battery

After this task is completed

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

Demo Video

Watch the procedure on YouTube