Dell XPS 18 (1810, Early 2013) - Manual (Page 33)

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Feature Functionality
1 Powered stand hinge Allows you to adjust the angle of your
computer between 10 degrees and
70 degrees.
2 Power-adapter port Connect the power adapter to
provide power to the computer, and
charge the battery.
3 Adapter cable clip Holds the adapter cable in place.
Powered Stand (optional) │ 33