Power Management User Guide
© Copyright 2007 Hewlett-Packard Development Company, L.P. Windows and Windows Vista are either trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty.
Table of contents 1 Setting power options Using power-saving states ................................................................................................................... 1 Initiating and exiting Sleep ................................................................................................... 1 Initiating and exiting Hibernation .......................................................................................... 2 Using the battery meter ..........................................
Index ...................................................................................................................................................................
1 Setting power options Using power-saving states The Windows Vista™ operating system has two power-saving states enabled at the factory: Sleep and Hibernation. When you initiate Sleep, the power lights blink and the screen clears. Your work is saved to memory, letting you exit Sleep faster than exiting Hibernation. If the computer is in the Sleep state for an extended period or if the battery reaches a critical battery level while in the Sleep state, the computer initiates Hibernation.
When the computer exits Sleep, the power lights turn on and your work returns to the screen where you stopped working. NOTE If you have set a password to be required on wakeup, you must enter your Windows password before your work will return to the screen. Initiating and exiting Hibernation The system is set at the factory to initiate Hibernation after 60 minutes of inactivity or when the battery reaches a critical battery level.
Using the battery meter The battery meter is located in the notification area, at the far right of the taskbar. The battery meter allows you to quickly access power settings, view remaining battery charge, and select a different power plan. ● To display the percentage of remaining battery charge and the current power plan, move the pointer over the battery meter icon. ● To access Power Options, or to change the power plan, click the battery meter icon and select an item from the list.
Using power plans A power plan is a collection of system settings that manages how the computer uses power. Power plans can help you conserve power or maximize performance. You can change power plan settings or create your own power plan. Viewing the current power plan ▲ Move the pointer over the battery meter icon in the notification area, at the far right of the taskbar. – or – Select Start > Control Panel > System and Maintenance > Power Options.
Setting password protection on wakeup To set the computer to prompt for a password when the computer exits Sleep or Hibernation, follow these steps: ENWW 1. Select Start > Control Panel > System and Maintenance > Power Options. 2. In the left pane, click Require a password on wakeup. 3. Click Change Settings that are currently unavailable. 4. Click Require a password (recommended). 5. Click Save changes.
2 Using battery power When a charged battery 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 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.
Using Battery Health in Help and Support The Battery Health section of the Help and Support Learning Center provides the following tools and information: ● Battery Check tool to test battery performance ● Information on calibration, power management, and proper care and storage to maximize battery life ● Information on battery types, specifications, life cycles, and capacity To access Battery Health: ▲ ENWW Select Start > Help and Support > Learning Center > Battery Health.
Displaying the remaining battery charge ▲ Move the pointer over the battery meter icon in the notification area, at the far right of the taskbar. – or – View the estimated number of minutes of battery charge remaining in Windows Mobility Center: ▲ Click the battery meter icon, and then click Windows Mobility Center. – or – Select Start > Control Panel > Mobile PC > Windows Mobility Center.
Inserting or removing the battery CAUTION Removing a battery that is the sole power source can cause 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. Turn the computer upside down on a flat surface, with the battery bay toward you. 2. Slide the battery (1) into the battery bay until it is seated. The battery release latch (2) automatically locks the battery into place.
Charging a battery WARNING! Do not charge the computer battery while you are onboard 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.
Managing low battery levels The information in this section describes the alerts and system responses set at the factory. Some lowbattery 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 When a battery that is the sole power source for the computer reaches a low battery level, the battery light blinks.
Resolving a low battery level CAUTION To reduce the risk of losing information when the computer reaches a critical battery level and has initiated Hibernation, do not restore power until the power lights turn off. Resolving a low battery level when external power is available ▲ Connect one of the following devices: ● AC adapter ● Optional expansion product or docking device ● Optional power adapter Resolving a low battery level when a charged battery is available 1.
Calibrating a battery Calibrate a battery under the following conditions: ● When battery charge displays seem inaccurate ● When you observe a significant change in battery run time Even if a battery is heavily used, it should not need to be calibrated more than once a month. It is also not necessary to calibrate a new battery. Step 1: Fully charge the battery WARNING! Do not charge the computer battery while you are onboard aircraft.
Step 3: Discharge the battery The computer must remain on while the battery is being discharged. The battery can discharge whether or not you are using the computer, but the battery will discharge 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.
Step 4: Fully recharge the battery To recharge the battery: 1. Plug the computer into external power and maintain external power until the battery is fully recharged. When the battery is recharged, the battery light on the computer turns off. You can use the computer while the battery is recharging, but the battery will charge faster if the computer is off. 2. If the computer is off, turn it on when the battery is fully charged and the battery light has turned off.
Conserving battery power 16 ● Select low power-use settings through Power Options in Windows Control Panel. ● Turn off wireless and local area network (LAN) connections and exit modem applications when you are not using them. ● Disconnect external devices that are not plugged into an external power source, when you are not using them. ● Stop, disable, or remove any external media cards that you are not using. ● Use the fn+f9 and fn+f10 hotkeys to adjust screen brightness as needed.
Storing a battery CAUTION To prevent damage to a battery, do not expose it to high temperatures for extended periods of time. If a computer will be unused and unplugged from external power for more than 2 weeks, remove the battery and store it separately. To prolong the charge of a stored battery, place it in a cool, dry place. Calibrate a battery before using it if it has been stored for one month or more.
Disposing of a used battery WARNING! To reduce the risk of fire or burns, do not disassemble, crush, or puncture a battery; short the external contacts on a battery; or dispose of a battery in fire or water. Do not expose a battery to temperatures above 60˚C (140˚F). Replace the battery only with a battery approved for this computer. Refer to the Regulatory, Safety and Environmental Notices for battery disposal information.
3 Using external AC power External AC power is supplied through one of the following devices: 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.
Connecting the AC adapter WARNING! To reduce the risk of electric shock or damage to the equipment: Plug the power cord into an AC outlet that is easily accessible at all times. Disconnect power from the computer by unplugging the power cord from the AC outlet (not by unplugging the power cord from the computer). If provided with a 3-pin attachment plug on the power cord, plug the cord into a grounded (earthed) 3-pin outlet.
4 Shutting down the computer CAUTION Unsaved information will be lost when the computer is shut down. The Shut Down command closes all open programs, including the operating system, and then turns off the display and computer.
Index A AC adapter, connecting 20 O operating system B battery calibrating 13 charging 10, 13 conserving power disposing 18 inserting 9 low battery levels recharging 15 removing 9 storing 17 battery light 10, 11 battery power 6 battery release latch battery temperature P power connecting conserving 20 16 16 R readable media 11 9 17 C calibrating battery 13 charging batteries 10, 13 connection, external power 20 conservation, power 16 critical battery level 11 D drive media 21 S shutdown 21 shuttin
