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Remove a CMOS battery (CR2032)

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

  • Lenovo has designed this product with your safety in mind. The lithium battery must be handled correctly to avoid possible danger. If you replace the battery, you must adhere to the following instructions.
  • 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 battery, you must reconfigure the server and reset the system date and time.
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.

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



  1. Prepare your server.
    1. Remove the top cover. See Remove the top cover.
    2. Remove the PCIe riser 1. See Remove a PCIe riser.
  2. Locate the CMOS battery (CR2032) on the system board. See System-board connectors
  3. Pivot the CMOS battery (CR2032) toward the PSU bays, and lift the CMOS battery (CR2032) out of the battery socket.
    Figure 1. Removing the CMOS battery (CR2032)
    Removing the CMOS battery (CR2032)
After you finish

Demo video

Watch the procedure on YouTube