Dell Alienware M11x R3 (Early 2011) - Manual (Page 68)

CHAPTER 4: INSTALLING AND REPLACING COMPONENTS
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4. Remove the two screws that secure the battery pack to the computer base.
5. Disconnect the battery pack cable from the connector on the system board.
6. Lift and slide the battery pack out of the computer.
1
2
3
1 battery pack 3 battery pack cable
2 screws (2)
To replace the battery pack, perform the removal steps in reverse order.