Dell Precision M2300 Guide De Référence Rapide page 18

Removing the Battery
CAUTION:
Using an incompatible battery may increase the risk of fire or
explosion. Replace the battery only with a compatible battery purchased from
Dell. The battery is designed to work with your Dell™ computer. Do not use a
battery from other computers with your computer.
CAUTION:
Before performing these procedures, turn off the computer, disconnect
the AC adapter from the electrical outlet and the computer, disconnect the modem
from the wall connector and computer, and remove any other external cables from
the computer.
NOTICE:
You must remove all external cables from the computer to avoid possible
connector damage.
To remove the battery:
1 If the computer is connected to a docking device (docked), undock it. See
the documentation that came with your docking device for instructions.
2 Ensure that the computer is turned off.
3 Slide the two latch releases on the bottom of the computer, and then
remove the battery from the bay.
To replace the battery, follow the removal procedure in reverse order.
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