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Remove the CMOS battery (CR2032)

Follow the instructions in this section to remove the CMOS battery.

About this task

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 CMOS battery must be handled correctly to avoid possible danger. If you replace the CMOS battery, you must adhere to local ordinances or regulations for battery disposal.
  • 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 CMOS battery, you must reconfigure the server and reset the system date and time.
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 ensure that you work safely.

  • Power off the server and peripheral devices, disconnect the power cords from the primary chassis, then disconnect the power cords from the secondary chassis. See Power off the server.

  • Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static-sensitive components in their static-protective packages until installation, and handling these devices with an electrostatic-discharge wrist strap or other grounding system.

  • If the server is installed in a rack, remove the server from the rack. See Remove the server from rails.

Procedure

  1. Make preparation for the task.
    1. Remove the front top cover. See Remove the front top cover.
    2. Remove the upper processor board (CPU BD) air baffle. See Remove the upper processor board (CPU BD) air baffle.
    3. Remove the upper processor board (CPU BD). See Remove the upper processor board (CPU BD).
  2. Locate the CMOS battery on the lower processor board (MB).
    Note
    The CMOS battery is only used on the primary chassis lower processor board (MB).
    Figure 1. CMOS battery location
    CMOS battery location
    1 CMOS battery location
  3. Gently press on the nub on the side of the CMOS battery as illustrated; then, 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 lower processor board (MB) and result in lower processor board (MB) replacement.


After you finish

  1. Install a replacement unit. See Install the CMOS battery (CR2032).

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

Demo video

Watch the procedure on YouTube