Battery; Rechargeable Li-Ion Battery Precautions; Removing The 3-Cell Battery - Dell Latitude 7420 Service Manual

NOTE: For instructions on how to find your computer's IMEI (International Mobile Station Equipment Identity) number,
see the knowledge base article
Next steps
1. Install the base cover.
2. Install the microSD card.
3. Follow the procedure in

Battery

Rechargeable Li-ion battery precautions

CAUTION:
● Exercise caution when handling rechargeable Li-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.
● Ensure any screws during the servicing of this product are not lost or misplaced, to prevent accidental
puncture or damage to the battery and other system components.
● If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing,
bending, or crushing a rechargeable Li-ion battery can be dangerous. In such an instance, contact Dell
technical support for assistance. See www.dell.com/contactdell.
● Always purchase genuine batteries from
● Swollen batteries should not be used and should be replaced and disposed properly. For guidelines on how to
handle and replace swollen rechargeable Li-ion batteries, see

Removing the 3-cell battery

Prerequisites
1. Follow the procedure in
2. Remove the microSD
3. Remove the base cover.
NOTE: If the battery is disconnected from system board, there is delay during computer boot as the computer undergoes
RTC (Real Time Clock) reset.
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after working inside your
before working inside your
card.
at https://www.dell.com/support/.
computer.
www.dell.com or authorized Dell partners and resellers.
Handling swollen rechargeable Li-ion
computer.
Removing and installing components
batteries.
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