Dell XPS 9380 Service Manual page 21

2 Remove the four screws (M2x2) that secure the battery to the palm-rest assembly.
3 Remove the screw (M1.6x4) that secures the battery to the palm-rest assembly.
4 Lift the battery off the palm-rest assembly.
5 Turn the computer over, open the display, and press the power button for about 5 seconds to ground the computer.
Removing the battery 21