Battery Packs - Compaq nw9440 - Mobile Workstation Manual

7

Battery packs

When a charged battery pack is in the computer and the computer
is not plugged into external power, the computer runs on battery
power. When the computer is plugged into external AC power, the
computer runs on AC power.
If the computer contains a charged battery pack and is running
on external AC power supplied through the AC adapter, the
computer switches to battery power if the AC adapter is
disconnected from the computer.
✎
The display brightness is automatically decreased to save
battery life when you disconnect AC power. To increase
display brightness, use the hotkey or reconnect the AC
fn+f10
adapter.
You can keep a battery pack in the computer or in storage,
depending on how you work. Keeping the battery pack in the
computer whenever the computer is plugged into external AC
power enables the battery pack to charge and also protects your
work in case of a power outage.
However, a battery pack in the computer slowly discharges when
the computer is turned off and not plugged into external power.
Power 7–1