User manual APPLE POWERBOOK G4 17-INCH (1.67GHZ)

[. . . ] PowerBook G4 17-inch User's Guide Includes setup, expansion, and troubleshooting information for your PowerBook G4 computer K Apple Computer, Inc. © 2005 Apple Computer, Inc. All rights reserved. Under the copyright laws, this manual may not be copied, in whole or in part, without the written consent of Apple. The Apple logo is a trademark of Apple Computer, Inc. , registered in the U. S. Use of the "keyboard" Apple logo (Option-Shift-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. [. . . ] The internal backup battery provides enough power to maintain the contents of RAM for up to 3 minutes while you change the battery. Note: If you have installed additional memory in your PowerBook, the backup battery may provide power for less than three minutes. Also, changing batteries several times in a short period can shorten the length of time the backup battery can maintain data if the backup battery hasn't had time to fully recharge. Important: If only one flashing light is on, very little charge is left. If no lights are visible, the battery is completely drained and the computer will not start up unless the power adapter is connected. Plug in the power adapter to let the battery recharge, or replace the drained battery with a fully charged battery (see page 53). Battery Battery LEDs If the battery icon in the Finder menu bar is set to show the percentage of charge, you may sometimes notice that the battery does not maintain a full charge of 100 percent when the power adapter is attached. When the battery level eventually drops below 95 percent, it will charge all the way to 100 percent. This saves battery life as charging is not continuously cycled on and off. 52 Chapter 3 Using Your Computer Removing and Replacing the Battery To remove the battery: m Shut down your PowerBook. Slide both latches up to unlock the battery, and gently remove it. To replace the battery: m Place one side of the battery into the battery compartment. Gently press the battery down until the battery latch locks into place. Note: Dispose of batteries according to your local environmental laws and guidelines. For more information, see "Battery Disposal Information" on page 100. Chapter 3 Using Your Computer 53 Charging a Battery When the power adapter that came with your computer is connected, the battery recharges whether the computer is off, on, or in sleep. However, the battery recharges more quickly if the computer is off or in sleep. You can monitor the battery charge level using the Battery status icon in the menu bar. The battery charge level displayed is based on the amount of power left in the battery with the applications, peripheral devices, and system settings (display brightness, Energy Saver settings, and so on) you are currently using. To make more battery power available, close applications and disconnect peripheral devices not in use, and adjust your Energy Saver settings (see the next section). Battery-Conservation Tips The amount of work time your PowerBook battery can provide before you need to recharge depends on the applications and peripheral devices you're currently using and the steps you take to conserve power while you work. For the best conservation of battery power, do the following: Â Disconnect bus-powered USB or FireWire devices when they are not in use. Â Turn AirPort off when not in use (use the AirPort status icon in the menu bar). Â Reduce screen brightness using the brightness controls on the PowerBook keyboard. In the Energy Saver pane of System Preferences, select the "Put the hard disk to sleep when possible" option. Â Set your PowerBook to sleep after inactivity of five minutes or less. 54 Chapter 3 Using Your Computer To further save battery power, select the following options in the Energy Saver pane of System Preferences: Â Set your computer to modify its processor speed based upon the required amount of processing activity. Your PowerBook is preset to automatically reduce its processing speed during periods of light processing activity when using battery power, thus reducing power usage. During periods of high processing activity, your computer will automatically switch to a higher processing speed. To check this setting, open the Energy Saver pane of System Preferences and click Show Details to see the settings. [. . . ] Veuillez contacter Apple pour des informations supplémentaires: Apple Canada, Inc. 7495 Birchmount Road Markham, Ontario Canada L3R 5G2 Service à la clientèle d'Apple Canada: 800-263-3394 Avertissement : Pour sa propre protection, l'utilisateur doit s'assurer que tout les fils de mise à la terre du secteur, des lignes téléphoniques et les canalisations d'eau métalliques, s'il y en a, soient raccordés ensemble. Cette précaution est particulièrement importante dans les régions rurales. L'utilisateur ne doit pas tenter de faire ces raccordements lui-même; il doit avoir recours à une service d'inspection des installations électriques ou à un électricien, selon le cas. [. . . ]