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Power Management
User Guide


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   Summary of Contents for HP KR922UT - 2133 Mini-Note - C7-M 1 GHz

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    Power Management User Guide...

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    © Copyright 2008 Hewlett-Packard Development Company, L.P. Windows is a U.S. registered trademark of Microsoft Corporation. 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.

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    Product notice This user guide describes features that are common to most models. Some features may not be available on your computer.

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    Product notice...

  • Page 5: Table Of Contents

    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 ........................3 Using power plans ..........................4 Viewing the current power plan ................... 4 Selecting a different power plan ..................

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    4 Testing an AC adapter 5 Shutting down the computer Index ................................... 27...

  • Page 7: Setting Power Options

    Setting power options Using power-saving states The computer has two power-saving states enabled at the factory: Sleep and Hibernation. When Sleep is initiated, the power light blinks 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.

  • Page 8: Initiating And Exiting Hibernation

    Initiating and exiting Hibernation The system is set at the factory to initiate Hibernation after 1,080 minutes of inactivity when running on battery power, 1,080 minutes (18 hours) of inactivity when running on external power, or when the battery reaches a critical battery level. Power settings and timeouts can be changed using Power Options in Windows Control Panel.

  • Page 9: Using The Battery Meter

    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. ●...

  • Page 10: Using Power Plans

    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.

  • Page 11: Setting Password Protection On Wakeup

    Setting password protection on wakeup To set the computer to prompt for a password when the computer exits Sleep or Hibernation, follow these steps: Select Start > Control Panel > System and Maintenance > Power Options. In the left pane, click Require a password on wakeup. Click Change Settings that are currently unavailable.

  • Page 12: Using External Ac Power

    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. ●...

  • Page 13: Connecting The Ac Adapter

    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).

  • Page 14: Using Battery Power

    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.

  • Page 15: Finding Battery Information In Help And Support

    Finding battery information in Help and Support The “Battery information” 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 ●...

  • Page 16: Using Battery Check

    Using Battery Check Battery Check, a part of the Total Care Advisor, provides information on the status of the battery installed in the computer. To run Battery Check: Connect the AC adapter to the computer. NOTE: The computer must be connected to external power for Battery Check to function properly. Select Start >...

  • Page 17: Displaying The Remaining Battery Charge

    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.

  • Page 18: Inserting Or Removing The Battery

    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: Turn the computer upside down on a flat surface, with the battery bay toward you.

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    Remove the battery (2) from the computer. Inserting or removing the battery...

  • Page 20: Charging A Battery

    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.

  • Page 21: Maximizing Battery Discharge Time

    Maximizing battery discharge time Battery discharge time varies, depending on the features you use while on battery power. Maximum discharge time gradually shortens as the battery storage capacity naturally degrades. Tips for maximizing battery discharge time: ● Lower the brightness on the display. ●...

  • Page 22: Managing Low Battery Levels

    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 When a battery that is the sole power source for the computer reaches a low battery level, the battery light blinks.

  • Page 23: Resolving A Low Battery Level

    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: ▲...

  • Page 24: Calibrating A Battery

    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.

  • Page 25: Step 3: Discharge The Battery

    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.

  • Page 26: Step 4: Fully Recharge The Battery

    Step 4: Fully recharge the battery To recharge the battery: 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.

  • Page 27: Conserving Battery Power

    Conserving battery power ● 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.

  • Page 28: Storing A Battery

    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.

  • Page 29: Disposing Of A Used Battery

    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).

  • Page 30: Replacing The Battery

    Replacing the battery Computer battery life varies, depending on the power management settings, programs running on the computer, display brightness, external devices connected to the computer, and other factors. Battery Check notifies you to replace the battery when an internal cell is not charging properly, or when the battery storage capacity has reached a “weak”...

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    Testing an AC adapter Test the AC adapter if the computer exhibits any of the following symptoms: ● The computer will not turn on when connected to the AC adapter. ● The display does not turn on when the computer is connected to the AC adapter. ●...

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    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. Shut down the computer under any of the following conditions: ●...

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    Index initiated during critical battery AC adapter, connecting 7 level 16 AC adapter, testing 25 initiating 2 battery low battery level 16 calibrating 18 charging 14, 18 operating system 26 conserving power 21 disposing 23 Help and Support 9 power inserting 12 battery 8 low battery levels 16...

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