Remove the CMOS battery (CR2032)

Follow instructions in this section to remove the 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.

S002

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

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

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.

About this task

Attention

• Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.
• Power off the server and peripheral devices and disconnect the power cords and all external cables. See Power off the server.
• If the server is installed in a rack, slide the server out on its rack slide rails to gain access to the top cover, or remove the server from the rack. See Remove the server from rails.

Procedure

1. Make preparation for this task.
   1. Remove the front top cover. See Remove the front top cover.
   2. Remove the rear top cover. See Remove the rear top cover.
   3. Depending on the server model, remove the following PCIe risers.
      • If the server is installed with three PCIe risers, remove PCIe riser 2. See Remove a PCIe riser.
      • If the server is installed with four PCIe risers, remove PCIe riser B and PCIe riser C. See Remove a PCIe riser.
2. Locate the CMOS battery on the system board assembly.
   Figure 1. CMOS battery location
   
   

   1 CMOS battery

3. Open the battery clip as shown and carefully take the CMOS battery out of the socket.
   Attention

   • Failing to remove the CMOS battery properly might damage the socket on the processor board. Any damage to the socket might require replacing the processor board.

   • Do not tilt or push the CMOS battery by using excessive force.

   Figure 2. Removing the CMOS battery
   

   

   
   

   1. Press the clip on the CMOS battery socket.

   2. Remove the CMOS battery.