Backup Battery


This procedure requires the following tools:

• Black stick (or other nonconductive nylon or plastic flat-blade tool)

Part Location

Preliminary Steps

Before you begin, remove the following:

  • Battery
  • Top case


1. Use a black stick to release the adhesive holding the backup battery to the optical drive then disconnect the backup battery cable.

Note: The backup battery is held down by double-backed tape adhesive on its cover.

Replacement Procedure

  1. Connect the backup battery cable to the backup battery and to the logic board.
  2. Remove any protective adhesive cover on the replacement backup battery.
  3. Notice the curve of the metal bracket along the right edge of the optical drive. Position the backup battery precisely as shown.

Important: If the backup battery is not positioned correctly, sharp edges on the top case over the backup battery may cause damage.

4. Press where shown to secure the backup battery to the optical drive.

  1. Reassemble the computer.
  2. Testing the computer should include plugging in the power adapter and letting the backup battery charge for half an hour. Then power on the computer and disconnect the power adapter, set the system clock, put the computer to sleep, remove the main battery for five seconds and reinstall. The date and time should not reset.

Also, insert an optical disc to verify that the optical drive functions properly.

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