Battery Packs and Power Management

How the Notebook Manages Power Automatically

Your notebook enters Hibernation and Standby automatically, and turns off the hard drive and display based on values set in Windows.

When this occurs

The result is

To resume

 

 

 

No keyboard, pointing

Display is turned off.

Briefly press any key

device, or other input

Conserves battery power

or move a pointing

activity occurs for the

and extends the life of the

device to turn on the

specified interval.

display.

display.

 

 

 

The hard drive is not

Hard drive is turned off.

Begin using the

accessed for a specified

Is usually set to occur

notebook, and

interval.

shortly after the display is

the hard drive is

 

turned off.

turned on.

 

 

 

No pointing devices are

Standby is initiated.

Briefly press the

used, no disk drive is

Maintains your current

power button to

accessed, and no port

session in RAM, and turns

return to your

(serial, parallel, or infrared)

off the display and other

current session.

is active for the specified

components to conserve

 

interval.

battery power.

 

 

 

 

The notebook stays in

Hibernation is initiated.

Press the power

Standby for the specified

Saves your current

button to return to

interval.

session to the hard drive,

your previous

 

and turns off the notebook.

session.

 

 

 

ÄCAUTION: Make a habit of saving your work before allowing your notebook to enter Standby. If power is interrupted while the notebook is in Standby, any information that was not saved will be lost.

The notebook can also enter Hibernation if battery power reaches a critically low level. If this happens, you will find on resuming that all your data has been saved, but some functions may be disabled. To resume normal operation, restore power by connecting an AC adapter or installing a charged battery pack, then turn the notebook off and restart it.

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Reference Guide

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HP 2145CA, 2500, 2185AF, 2158, 2505EA manual How the Notebook Manages Power Automatically, When this occurs Result is To resume

2550CA, 2542EA, 2562AP, 2569AP, 2555AP specifications

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