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Holds the battery.
Supports a wireless subscriber identity module (SIM). The
SIM slot is located inside the battery bay.
Battery release latch
Releases the battery from the battery bay.
Connects an optional accessory battery.
an optional docking device.
Bottom cover release latch
Releases or locks the bottom cover.
Enable airflow to cool internal components.
The computer fan starts up automatically to cool
internal components and prevent overheating. It is normal
for the internal fan to cycle on and off during routine
Contains a Bluetooth device (select models only).