13 Useful Informationn When using peripheral devicesFollow these instructions and the Reference Manual to avoid any damage to the devices. Carefully read the instructionmanuals of the peripheral devices.l Use the peripheral devices conforming to the computer’s specifications.l Connect to the connectors in the correct direction.l If it is hard to insert, do not try forcibly but check the connector’s shape, direction, alignment of pins, etc.l If screws are included, fasten them securely.l Remove the cables when you carry the computer. Do not pull the cables forcibly.n Preventing your computer from unauthorized use via wireless LAN/Bluetooth/Wireless WANl Before using wireless LAN/Bluetooth/Wireless WAN, make the appropriate security settings such as data encryp-tion.n Battery Recalibrationl The battery recalibration may take a long time due to the large battery capacity. This is not a malfunction. Full charge: Approximately 3.5 hours Complete discharge: Approximately 4.0 hoursWhen performing “Battery Recalibration” without shutting down Windows, it may take more time to charge / dis-charge.MaintenanceTo clean the LCD panelIf drops of water or other stains get on the surface of the LCD panel, wipe them off immediately. Failure to do so mayresult in staining.Use the soft cloth included with the computer. (For further information, refer to “Suggestions About Cleaning the LCDSurface” è Reference Manual “Screen Input Operation”.)To clean areas other than the LCD panelWipe with a soft dry cloth such as gauze. When using detergent, dip a soft cloth in water-diluted detergent and wring itthoroughly.CAUTIONl Do not use benzene, thinner, or rubbing alcohol since it may adversely affect the surface causing discoloration, etc.Do not use commercially-available household cleaners and cosmetics, as they may contain components harmful tothe surface.l Do not apply water or detergent directly to the computer, since liquid may enter inside of the computer and causemalfunction or damage.