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Bottom components
Item Component Function
(1) Battery bay Holds the battery.
(2) Battery release latches Releases the battery from the battery bay.
(3) Accessory battery connector Connects an optional accessory battery.
(4) Vents (3) Enable airflow to cool internal components.
NOTE: 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 operation.
(5) Bluetooth module compartment (select models
only)
Contains a Bluetooth device.
(6) Docking connector (select models only) Connects an optional docking device.
(7) Memory/WLAN module compartment Contains the memory module slot and the WLAN module slot.
CAUTION: To prevent an unresponsive system, replace the
wireless module only with a wireless module authorized for use
in the computer by the governmental agency that regulates
wireless devices in your country or region. If you replace the
module and then receive a warning message, remove the
module to restore computer functionality, and then contact
technical support through Help and Support.
(8) Hard drive bay Holds the hard drive.
18 Chapter 2 External component identification