Compaq nc6120 Hardware and Software Guide - Page 56

Battery Packs

Page 56 highlights

Power Battery Packs When the notebook is connected to external AC power, the notebook runs on AC power. When a charged battery pack is in the notebook and the notebook is not connected to external power, the notebook runs on battery power. The notebook alternates between AC power and battery power according to the availability of an external AC power source. For example, if the notebook contains a charged battery pack and is running on external AC power supplied through the AC adapter, the notebook switches to battery power if the AC adapter is disconnected from the notebook. You can leave a battery pack in the notebook or in storage, depending on how you work. Keeping a battery pack in the notebook enables the battery pack to charge whenever the notebook is connected to external AC power and also protects your work in case of a power outage. However, battery packs in the notebook slowly discharge when the notebook is turned off. For this reason, the primary battery pack is not shipped inside the notebook and must be inserted before the notebook can run on battery power. Hardware and Software Guide 2-19

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Power
Hardware and Software Guide
2–19
Battery Packs
When the notebook is connected to external AC power, the
notebook runs on AC power. When a charged battery pack is in
the notebook and the notebook is not connected to external
power, the notebook runs on battery power.
The notebook alternates between AC power and battery power
according to the availability of an external AC power source. For
example, if the notebook contains a charged battery pack and is
running on external AC power supplied through the AC adapter,
the notebook switches to battery power if the AC adapter is
disconnected from the notebook.
You can leave a battery pack in the notebook or in storage,
depending on how you work. Keeping a battery pack in the
notebook enables the battery pack to charge whenever the
notebook is connected to external AC power and also protects
your work in case of a power outage.
However, battery packs in the notebook slowly discharge when
the notebook is turned off. For this reason, the primary battery
pack is not shipped inside the notebook and must be inserted
before the notebook can run on battery power.