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Remove the CMOS battery (CR2032)

Use this information to remove the CMOS battery (CR2032).


When replacing the lithium battery, use only Lenovo specified part number or an equivalent type 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.

disconnect all power
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.
Before removing the CMOS battery:
  1. If the server is in a rack, remove it from the rack.

  2. Remove any locking device that secures the server cover, such as a Kensington lock or a pad lock.

  3. Remove the server cover (see Remove the server cover).

  1. Locate the CMOS battery on the system board (see System board components).
  2. Press on the nub on the side of the CMOS battery; then, pivot the battery away from the socket to remove it.
    Do not apply excessive force on the CMOS battery. Failing to remove the CMOS battery properly might damage the socket on the system board. Any damage to the socket might require replacing the system board.
    Figure 1. Removing the CMOS battery
    Removing the CMOS battery
After removing the CMOS battery:
  1. Install a new CMOS battery. See Install the CMOS battery (CR2032).

  2. If you are instructed to return the defective component, please package the part to prevent any shipping damage. Reuse the packaging the new part arrived in and follow all packaging instructions.

Demo video

Watch the procedure on YouTube