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Removing the system battery

Use this information to remove the CMOS battery.

Before you remove the system battery, complete the following steps:

  1. Read the safety information in Safety and Installation guidelines.

  2. If the compute node is installed in a Lenovo ThinkServer n400 Enclosure Type 5495, remove it (see Removing a compute node from a chassis for instructions).
  3. Carefully lay the compute node on a flat, static-protective surface, orienting the compute node with the bezel pointing toward you.

The following notes describe information that you must consider when replacing the battery.

  • 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.

    Statement 2

    CAUTION

    When replacing the lithium battery, use only Lenovo Part Number 33F8354 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.

To remove the system battery, complete the following steps:

  1. Remove the compute node (see Removing a compute node from a chassis).
  2. If necessary, lift the node and SATA cable out of the way (see Removing the node SATA cable).
  3. Remove the system battery:
    1. Use a fingernail to press the top of the battery clip away from the battery. The battery pops up when it is released.
    2. Use your thumb and index finger to lift the battery from the socket.
      Figure 1. System battery removal
      System battery removal
      Attention
      Do not lift the battery by using excessive force. Failing to remove the battery properly may damage the socket on the system board. Any damage to the socket may require replacing the system board.
  4. Dispose of the battery as required by local ordinances or regulations.