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Batteries - Dell Latitude 7220EX Service Manual

Rugged extreme tablet
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Steps
1. Place the system cover assembly on the tablet and tighten the two (M4x11.5) captive screws that secure the side cover
assembly to the chassis.
2. Replace the eight (M2.5x10), (M4x7) screw and 12 (M2x6) screws that secure the system cover to the chassis.
CAUTION:
The torque setting for this step is critical to maintain IP20 rating. For all screws in this step, the
torque requirement is 3 kgf-cm.
Next steps
1. Install the stylus.
2. Install the
batteries cover
3. Follow the procedure in

Batteries

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.
● Do not use tools of any kind to pry on or against the battery.
24
Field service information
assembly.
after working inside the
tablet.

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