HP ZBook 15 Mobile Workstation - Manual (Page 22)

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Component Description
(1) Battery release latch Releases the battery.
(2) Battery bay Holds the battery.
(3) Docking connector Connects an optional docking device.
(4) Accessory battery connector Connects an optional accessory battery.
(5) Service cover release lock Locks the service cover.
(6) Service cover release latch Releases the service cover on the computer.
12 Chapter 2 Getting to know your computer