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Install the CMOS battery into the SMM

Use this information to install the CMOS battery into the SMM.

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.

Before you install the CMOS battery into the SMM:
  1. Read the following section(s) to ensure that you work safely.
  2. Remove the SMM (see Remove the System Management Module (SMM)).

Make sure to read the following notes carefully before replacing the CMOS battery in the SMM.
  • When replacing the battery, you must replace it with another CMOS battery of the exact same type made by the same manufacturer.
  • To order replacement batteries, call 1-800-426-7378 in the United States, and 1-800-465-7999 or 1-800-465-6666 in Canada. Outside the U.S. and Canada, call your Lenovo marketing representative or authorized reseller.
  • After you replace the battery, you must reconfigure the time settings.
  • To avoid possible danger, read and follow the following safety statement.

Complete the following steps to install the CMOS battery into the SMM.

  1. Locate the CMOS battery on the SMM, and remove it (see Remove the CMOS battery from the SMM).
    Figure 1. CMOS battery on the SMM
    CMOS battery on the SMM
    Table 1. CMOS battery
    1 CMOS battery
  2. Follow any special handling and installation instructions that come with the battery to be installed.
  3. Tilt the battery to insert it into the socket.
    Figure 2. CMOS battery installation
    CMOS battery installation
  4. As you slide the battery into place, press the battery down into the socket until it clicks into place.
After you install the CMOS battery into the SMM, complete the following steps.
  1. Reinstall the SMM (see Install the System Management Module (SMM)).

  2. Start the Setup Utility and reset the configuration.

Demo video

Watch the procedure on YouTube