HP Pavilion Dv7t 4000 Cto Select Edition Entertainment Notebook Pc Manual

Using external AC power
WARNING!To reduce potential safety issues, use only the AC adapter provided with the computer,
a replacement AC adapter provided by HP, or a compatible AC adapter purchased from HP.
WARNING!Do not charge the computer battery while on board an aircraft.
External AC power is supplied through:
●An approved AC adapter
●An optional docking device or expansion product
Connect the computer to external AC power:
●When charging or calibrating a battery.
●When installing or modifying system...

42 Chapter 5   Power management 

Using battery power
When a charged battery is in the computer and the computer is not connected to external power, the
computer runs on battery power. When the computer is connected to external AC power, the computer
runs on AC power.
If the computer contains a charged battery 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 decreased to save battery life when you...

Displaying the remaining battery charge
To display the remaining battery charge, move the pointer over the battery meter icon in the notification
area.
Inserting or removing the battery
CAUTION:Removing a battery that is the sole power source causes loss of information. To prevent
loss of information, initiate Hibernation or shut down the computer through Windows before removing
the battery.
To insert the battery:
1.Close the display.
2.Turn the computer upside down on a flat surface.
3.Insert the...

Charging a battery
WARNING!Do not charge the computer battery while on board aircraft.
The battery charges whenever the computer is plugged into external power through an AC adapter, an
optional power adapter, an optional expansion product, or an optional docking device.
The battery charges whether the computer is off or in use, but it charges faster when the computer is
off.
Charging might take longer if a battery is new, has been unused for two weeks or more, or is much
warmer or cooler than room...

●Remove the battery from the computer when it is not being used or charged.
●Store the battery in a cool, dry location.
Managing low battery levels
The information in this section describes the alerts and system responses set at the factory. Some low-
battery alerts and system responses can be changed using Power Options in Windows Control Panel.
Preferences set using Power Options do not affect lights.
Identifying low battery levels
If a low battery level is not resolved, the computer enters a critical...

Calibrating a battery
Calibrate the battery when:
●The battery charge displays seem inaccurate.
●You observe a significant change in battery run time.
A heavily used battery should only be calibrated once a month. Do not calibrate a new battery.
To calibrate the battery:
1.Fully charge the battery.
WARNING!Do not charge the computer battery while on board an aircraft.
NOTE:The battery charges while the computer is off or in use, but it charges faster when the
computer is off.
To fully charge the...

The computer must remain on while the battery is being discharged. The battery discharges
whether or not you are using the computer, but the battery discharges faster while you are using
it.
●If you plan to leave the computer unattended during the discharge, save your information
before beginning the discharge procedure.
●If you use the computer occasionally during the discharge procedure and have set energy-
saving timeouts, expect the following performance from the system during the discharge
process:...

●Disconnect external devices that are not connected to an external power source when you are not
using them.
●Stop, disable, or remove any external media cards that you are not using.
●Press the Decrease Screen Brightness key or Increase Screen Brightness key to adjust screen
brightness as needed.
●If leaving your work, initiate Sleep or Hibernation, or shut down the computer.
Storing a battery
CAUTION:To prevent damage to a battery, do not expose it to high temperatures for extended periods
of time.
If...

Switching between graphics modes (select models only)
The computer is equipped with switchable graphics and has two modes for processing graphics. When
switching from AC power to battery power, the computer switches from High-performance mode to
Power-saving mode to conserve battery life. Similarly, when switching from battery power to AC power,
the computer switches back to the High-performance mode.
NOTE:In order to optimize computer performance, the system might not allow switching modes, or
prompt...