Compaq Armada M300 Series Reference Manual page 37

If external power is available, do one of the following—
Connect the computer to an electrical outlet with the AC
Adapter.
Dock the computer and mobile expansion unit in a docking
base that is connected to external power.
Plug an optional Automobile Power Adapter/Charger into
the power connector on the computer and into a vehicle
cigarette lighter receptacle.
Plug an optional Aircraft Power Adapter into the power
connector on the computer and into the in-seat power
supply available on some commercial aircraft.
An optional Aircraft Power Adapter can be used to run
the computer but cannot be used to charge a battery pack.
If a charged battery pack is available—Save your work,
shut down the computer, then remove the discharged battery
pack and insert a charged battery pack.
If neither external power nor a charged battery pack is
available—
Press
or
Save your work, then shut down the computer.
Press the power button. If the computer does not have
enough power to restore your work,
1. Press
2. Attach a charged battery pack or connect the computer to
external power.
3. Press the power button.
suspend button to initiate Hibernation
to abort the restoration.