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HP Nc2400 Power - Page 23

Battery packs

UPC - 883585088331

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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. NOTE The display brightness is automatically decreased to save battery life when you disconnect AC power. To increase display brightness, use the fn+f10 hotkey or reconnect the AC 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. ENWW 19

Section	Page
Power control and light locations	5
Power sources	7
Connecting the AC adapter	8
Standby and hibernation	9
Standby	9
Hibernation	10
Initiating standby, hibernation or shutdown	11
When you leave your work	11
When a reliable power supply is unavailable	11
When using wireless communication (select models only), or readable or writable media (select models ...	12
Default power settings	13
Turning the computer or display on or off	13
Using emergency shutdown procedures	14
Initiating or resuming from standby	15
Initiating or restoring from hibernation	16
Power options	17
Accessing Power Options Properties	17
Displaying the Power Meter icon	18
Setting or changing a power scheme	19
Setting a security prompt	19
Processor performance controls	21
Battery packs	23
Inserting or removing a battery pack	24
Charging a battery pack	26
Monitoring the charge of the battery pack	26
Obtaining accurate charge information	26
Displaying charge information on the screen	27
Viewing charge displays	27
Interpreting charge indicators	27
Managing low-battery conditions	28
Identifying low-battery conditions	28
Low-battery condition	28
Critical low-battery condition	28
Resolving low-battery conditions	29
When external power is available	29
When a charged battery pack is available	29
When no power source is available	29
When the computer cannot restore from hibernation	29
Calibrating a battery pack	30
When to calibrate	30
How to calibrate	30
Step 1: Charging the battery pack	30
Step 2: Discharging the battery pack	31
Step 3: Recharging the battery pack	32
Conserving battery power	33
Conserving power as you work	33
Selecting power conservation settings	33
Storing a battery pack	34
Disposing of a used battery pack	34

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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.

NOTE

The display brightness is automatically decreased to save battery life when you

disconnect AC power. To increase display brightness, use the

fn+f10

hotkey or reconnect the

AC 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.

ENWW