Battery Cable; Lithium-Ion Battery Precautions - Dell Latitude 3420 Service Manual

Steps
1. Align and place the base cover on the palmrest assembly, and snap the base cover latches into place.
2. Tighten the eight captive screws to secure the base cover to the computer chassis.
Next steps
1. Exit the service mode
2. Install the SIM card tray
3. Install the microSD-card.
4. Follow the procedure in

Battery cable

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.
● Do not bend the battery.
20 Removing and installing components
for 4G LTE enabled systems.
after working inside your computer.