HP Compaq Presario,Presario V2000 Hardware And Software Manual page 63

Power
Resolving Low-Battery Conditions
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CAUTION: To prevent problems when restoring from hibernation: If the
notebook has reached a critical low-battery condition and has begun to
initiate hibernation, do not restore power until hibernation is complete.
When hibernation is complete, the power/standby lights are turned off.
To resolve a low-battery condition:
■
If external power is available, connect the notebook to the
external power source.
■
If a charged battery pack is available, shut down the notebook
or initiate hibernation. Insert a charged battery pack, and then
turn on the notebook.
■
If no power source is available, save your work. Then initiate
hibernation or shut down the notebook.
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