HP CQ58 manual

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Component		Description
(1)	Battery bay	Holds the battery.
(2)	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.
(3)	Battery release latch	Releases the battery from the battery bay.

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