Battery Module And Floppy Disk Drive Module (End User Replaceable); Figure 2 - Floppy Drive And Battery - HP OmniBook 4000 Familiarization Manual

Battery Module and Floppy Disk Drive Module
(End User Replaceable)
The Battery and Floppy Disk Drive Modules are user replaceable. A second
Battery Module may be installed in the Floppy Disk Drive Bay. This doubles the
battery life of the OmniBook 4000.
To remove either module, turn the OmniBook over. Squeeze the two levers
together and slide the module forward.
Reverse the procedure to install a new Battery or Floppy Disk Drive Module.

Figure 2 - Floppy Drive and Battery

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