Skip to main content

Install the CMOS battery (CR2032)

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

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.

About this task

Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.
The following notes describe information that you must consider when you are replacing the CMOS battery in the server:
  • You must replace the CMOS battery with a lithium CMOS battery of the same type from the same manufacturer.
  • After you replace the CMOS battery, you must reconfigure the server and reset the system date and time.


  1. Follow any special handling and installation instructions that come with the CMOS battery.
    Touching the CMOS battery on a metal surface, such as the side of the server, when you replace the CMOS battery can cause it to fail.
  2. Locate the battery socket on the system board assembly.
  3. Orient the CMOS battery so that the positive (+) side faces toward the center of the server.
  4. Tilt the CMOS battery at an angle and insert it into the battery socket.
    Figure 1. CMOS battery installation
    CMOS battery installation

After you finish

  1. Reinstall the PCIe riser 2 if necessary. See Install a PCIe riser.
  2. Complete the parts replacement. See Complete the parts replacement.
  3. Reconfigure the server and reset the system date and time.

Demo video

Watch the procedure on YouTube