Dell XPS 15 (L521X, Mid 2012) - Manual (Page 22)

Replacing the Battery
WARNING: Before working inside your computer, read the safety information
that shipped with your computer and follow the steps in "Before You Begin" on
page 8. After working inside your computer, follow the instructions in
"After Working Inside Your Computer" on page 10. For additional safety best
practices information, see the Regulatory Compliance Homepage at
dell.com/regulatory_compliance.
Procedure
1 Slide the battery under the tab on the palm-rest assembly and align the screw holes
on the battery with the screw holes on the palm-rest assembly.
2 Replace the screws that secure the battery to the palm-rest assembly.
3 Connect the battery cable to the system board.
Postrequisites
Follow the instructions from step 2 to step 7 in "Replacing the Base Cover" on page 14.
22 | Replacing the Battery