User manual APPLE POWERBOOK G4 17-INCH

[. . . ] 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. [. . . ] If your battery runs low while you are working, attach your power adapter and let the battery recharge. Even if your computer is not connected to a power adapter, you can quickly change batteries without shutting down or saving your work by putting your PowerBook to sleep and replacing the battery with a charged one. Your PowerBook provides enough power to maintain the contents of RAM for up to three minutes while you change the battery. Note: If you have installed additional memory in your PowerBook, it may only provide power for less than three minutes. Also, changing batteries several times in a short period can further reduce this length of time. 52 Chapter 3 Using Your PowerBook 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 54). Battery Battery LEDs If the battery icon in the Finder menu bar is set to show the percentage of charge, you might sometimes notice that the battery does not attain a full 100 percent charge when the power adapter is attached. This is normal behavior; battery life is saved when charging is not continuously cycled on and off when the battery's charge capacity is between 95 and 100 percent. When the battery level eventually drops below 95 percent, it will charge all the way to 100 percent. Chapter 3 Using Your PowerBook 53 Removing and Replacing the Battery To remove the battery: 1 Shut down your PowerBook. Disconnect the power adapter, phone cord, and any other cables connected to the PowerBook to prevent damaging the computer. 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. Note: Dispose of batteries according to your local environmental laws and guidelines. For more information, see "Disposal and Recycling Information" on page 100. 54 Chapter 3 Using Your PowerBook 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. When the PowerBook is on, 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). Understanding 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. If these icons don't appear in the menu bar, you can turn them on in the Network and Bluetooth panes of System Preferences. ) Â Quit open applications that you are not using. 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. Chapter 3 Using Your PowerBook 55 Â Your PowerBook is preset to automatically reduce its processing speed during periods of light processing activity when using battery power, thus reducing power usage. The setting that determines this is the Normal option in the Optimization pop-up menu of the Energy Saver pane of System Preferences. [. . . ] 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. Â Numéro de charge: 0. 1 L'indice de charge (IC) assigné à chaque dispositif terminal indique, pour éviter toute surcharge, le pourcentage de la charge totale qui sera raccordée à un circuit téléphonique bouclé utilisé par ce dispositif. La terminaison du circuit bouclé peut être constituée de n'importe quelle combinaison de dispositifs pourvu que la somme des indices de charge de l'ensemble des dispositifs ne dépasse pas 100. [. . . ]