Acer 4120 manual Potentially explosive environments, Replacing the battery pack

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discharged hundreds of times, but it will eventually wear out. When the operation time becomes noticeably shorter than normal, buy a new battery. Use only Acer approved batteries, and recharge your battery only with Acer approved chargers designated for this device.

Use the battery only for its intended purpose. Never use any charger or battery that is damaged. Do not short-circuit the battery. Accidental short-circuiting can occur when a metallic object such as a coin, clip or pen causes direct connection of the positive (+) and negative (-) terminals of the battery. (These look like metal strips on the battery.) This might happen, for example, when you carry a spare battery in your pocket or purse. Short-circuiting the terminals may damage the battery or the connecting object.

The capacity and lifetime of the battery will be reduced if the battery is left in hot or cold places, such as in a closed car in summer or winter. Always try to keep the battery between 15°C and 25°C (59°F and 77°F). A device with a hot or cold battery may not work temporarily, even when the battery is fully charged. Battery performance is especially limited in temperatures well below freezing.

Do not dispose of batteries in a fire as they may explode. Batteries may also explode if damaged. Dispose of batteries according to local regulations. Please recycle when possible. Do not dispose as household waste.

Wireless devices may be susceptible to interference from the battery, which could affect performance.

Potentially explosive environments

Switch off your device in any area with a potentially explosive atmosphere and obey all signs and instructions. Potentially explosive atmospheres include areas where you would normally be advised to turn off your vehicle engine. Sparks in such areas could cause an explosion or fire resulting in bodily injury or even death. Switch off the notebook near gas pumps at service stations. Observe restrictions on the use of radio equipment in fuel depots, storage and distribution areas; chemical plants; or where blasting operations are in progress. Areas with a potentially explosive atmosphere are often, but not always, marked. They include below deck on boats, chemical transfer or storage facilities, vehicles using liquefied petroleum gas (such as propane or butane), and areas where the air contains chemicals or particles such as grain, dust or metal powders. Do not switch the notebook on when wireless phone use is prohibited or when it may cause interference or danger.

Replacing the battery pack

The notebook uses lithium batteries. Replace the battery with the same type as that which came bundled with your product. Use of another battery may present a risk of fire or explosion.

Warning! Batteries may explode if not handled properly. Do not disassemble or dispose of them in fire. Keep them away from children. Follow local regulations when disposing of used batteries.

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Contents Extensa 4420/4120 Series Users GuidePage Information for your safety and comfort Safety instructionsTurning the product off before cleaning Using electrical power Guidelines for safe battery usage Product servicingReplacing the battery pack Potentially explosive environmentsOperating environment Additional safety informationTelephone line safety Medical devicesVehicles Potentially explosive environmentsEmergency calls Disposal instructions Mercury advisoryTips and information for comfortable use Finding your comfort zone Taking care of your visionDeveloping good work habits Your guides Basic care and tips for using your computerFirst things first Turning your computer on and offTaking care of your computer Taking care of your AC adapterTaking care of your battery pack Cleaning and servicingPlease refer to Frequently asked questions on Xvi Contents Using a computer security lock Audio Acer eRecovery Management Page Acer Empowering Technology Empowering Technology passwordAcer eNet Management Empowering Technology To create a new power plan Acer ePower ManagementUsing power plans To switch between power plansTo delete a power plan Battery statusAcer ePresentation Management Acer eDataSecurity Management for selected models Acer eLock Management Empowering Technology Acer eRecovery Management Empowering Technology Acer eSettings Management Windows Mobility Center for Windows Vista only Empowering Technology Your Acer notebook tour Front viewDescription Easy-launch buttons on page 26 for more details Launch buttons on page 26 for more detailsClosed front view Icon DescriptionLeft view # Icon DescriptionRight view Rear viewBase view Specifications English English English Indicators Icon Function DescriptionIcon Easy-launch button Default application Easy-launch buttonsIcon Productivity key Default application Touchpad Touchpad basicsFunction Left Right Main touchpad Center button Button Lock keys and embedded numeric keypad Using the keyboardDesired access Num Lock on Num Lock off Lock key DescriptionWindows keys KeyDescriptionHotkeys Fn + → Hotkey Icon Function Description Fn + ↑Fn + ↓ Fn + ←Euro symbol Special keysUS dollar sign Ejecting the optical CD or DVD drive tray Using a computer security lock Adjusting the volume AudioUsing the system utilities Acer GridVista dual-display compatibleLaunch Manager Norton Internet Security How do I check for viruses?Select Tasks & Scans NTI Shadow Frequently asked questions Nothing appears on the screenImage is not full-screen Infrared port does not work No audio is heard from the computerKeyboard does not respond Printer does not workWant to set up my location to use the internal modem Requesting service International Travelers Warranty ITWBefore you call Battery pack Battery pack characteristicsMaximizing the batterys life Installing and removing the battery pack Charging the battery Checking the battery levelOptimising battery life Battery-low warning Situation Recommended ActionMoving around Disconnecting from the desktopTaking your notebook PC with you Preparing the computerTaking the computer home What to bring to meetingsWhat to take with you Setting up a home office Traveling with the computerSpecial considerations Traveling internationally with the computer What to bring with youUsing a computer security lock Using passwordsSecuring your computer Entering passwords Setting passwordsExpanding through options Connectivity optionsFax/data modem Built-in network feature Fast Infrared FIRUniversal Serial Bus USB Ieee 1394 portPC Card slot Inserting a PC CardEjecting a PC Card Bios utility Boot sequenceInstalling memory Using software Enable disk-to-disk recoveryPassword Playing DVD moviesAcer eRecovery Management Create backupBurn backup disc Restore and recoveryTroubleshooting tips Error messagesError messages Corrective action English Regulations and safety notices FCC noticeOperation conditions Modem notices Remarque à lintention des utilisateurs canadiensDeclaration of Conformity for EU countries TBR List of applicable countriesEnglish Laser compliance statement LCD pixel statementMacrovision copyright protection notice European Union EU Article 3.1a Health and SafetyRadio device regulatory notice General Article 3.1b EMCEnglish FCC RF safety requirement English LCD panel ergonomic specifications USA Acer Computer Shanghai Limited EN60950-12001 EN600652002 applied to models with TV functionIndex English