Dell XPS 15 (L501X, Late 2010) - Manual (Page 14)

14 Battery
Replacing the Battery
CAUTION: To avoid damage to the computer, use only the battery designed for
this particular Dell computer.
1 Follow the instructions in "Before You Begin" on page 9.
2 Align the tabs on the battery with the slots in the battery bay and press the
battery down until it clicks into place.
1 battery 2 battery release latch
1
2