Remove the CMOS battery (CR2032)

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

About this task

S002

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

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

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

• Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.

• Power off the server and peripheral devices and disconnect the power cords and all external cables. See Power off the server.

• If the node is installed in an enclosure or mounted, remove the node from the enclosure or mount. See Configuration guide.

Procedure

1. Make preparation for this task.
   1. Remove the fan shroud. See Remove a fan shroud.
   2. If applicable, remove the expansion filler. See Remove the expansion filler.
   3. If applicable, remove the expansion kit. See Remove the expansion kit.
   4. Remove the top cover. See Remove the top cover.
2. Locate the battery socket on the system board.
   Figure 1. CMOS battery location
   
   

   1 CMOS battery

   Note

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

   Figure 2. Removing the CMOS battery