Battery; Lithium-Ion Battery Precautions - Dell Latitude 9420 Service Manual

Steps
1. Align and place the palm-rest assembly under the hinges of the display assembly.
2. Replace the six (M2.5x3) screws that secure the display assembly to the system.
3. Connect the display and camera cable to the connector on the system board.
Next steps
1. Install the base cover.
2. Install the SIM card tray.
3. Install the SD card.
4. Exit service mode.
5. Follow the procedure in

Battery

Lithium-ion battery precautions

CAUTION:
● Exercise caution when handling Lithium-ion batteries.
● Discharge the battery completely before removing it. Disconnect the AC power adapter from the system and
operate the computer solely on battery power—the battery is fully discharged when the computer no longer
turns on when the power button is pressed.
● Do not crush, drop, mutilate, or penetrate the battery with foreign objects.
● Do not expose the battery to high temperatures, or disassemble battery packs and cells.
● Do not apply pressure to the surface of the battery.
After working on your computer.
Removing and installing components 33