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Install the CMOS battery (CR2032)

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

About this task

To avoid potential danger, read and follow the following safety statements.
  • S002
    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.
  • S004

    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.

  • S005
    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.
Make sure to read the following notes carefully before replacing the CMOS battery in the server.
  • Read the Installation guidelines to ensure that you work safely.

  • Do not make CMOS battery in contact with any metal surface during the replacement. Any contact with a metal surface can cause damages to the battery.

  • When replacing the battery, you must replace it with another CMOS battery of the exact same type (CR2032) made by the same manufacturer.

  • After you replace the battery, you must reconfigure the solution and reset the system date and time.


  1. Follow any special handling and installation instructions that come with the CMOS battery.
  2. Locate the battery socket on the system board (see System-board components).
  3. Install the new CMOS battery into the server.
    1. Orient the battery so that the positive (+) side faces up; then, tilt the battery to insert it into the socket.
    2. Gently press the battery into the socket until it clicks in place.
    Figure 1. Installing the CMOS battery
    Installing the CMOS battery

After this task is completed

  1. Complete the parts replacement. See Complete the parts replacement.

  2. Reconfigure the server and reset the system date, time and passwords.

Demo video

Watch the procedure on YouTube