Dell Alienware Aurora R2 (Early 2010) - Manual (Page 63)

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CHAPTER 12: BATTERY
Connect your computer and devices to electrical outlets and then turn 6.
them on.
Enter system setup (see “Entering System Setup” on page
7. 107) and restore
the settings you recorded before removing the battery.
Replacing the Coin-Cell Battery
Follow the instructions in “Before You Begin” on page 1. 6.
Insert the new battery (CR2032) into the socket with the side labeled “+” 2.
facing up, and press the battery into place.
Replace the PCI-Express cards (see “Replacing the PCI-Express Card(s)” on 3.
page 33).
Close the PCI shroud (see “Closing the PCI Shroud“ on page
4. 18).
Replace the left side-panel (see “Replacing the Left Side-Panel“ on page 5. 11).