HP 6520s - Notebook PC Getting Started page 50

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If you plan to use the computer during a flight, check with the airline in advance. In-flight
computer use is at the discretion of the airline.
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If the computer will be unused and disconnected from external power for more than 2
weeks, remove the battery and store it separately.
● If you are shipping the computer or a drive, place it in a bubble-pack mailer or other
suitable protective packaging and label the package "FRAGILE."
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If the computer has a wireless device or a cell phone device installed, such as an
802.11b/g, a Global System for Mobile Communications (GSM), or a General Packet
Radio Service (GPRS) device, note that the use of these devices may be restricted in
some environments. Such restrictions may apply onboard aircraft, in hospitals, near
explosives, in hazardous locations, and so on. If you are uncertain of the policy that
applies to the use of a particular device, ask for authorization to use it before you turn
it on.
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If you are traveling internationally, follow these suggestions:
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44 Appendix C Routine care
Check the computer-related customs regulations for each country or region on
your itinerary.
Contact technical support to discuss power cord and adapter requirements for
each location in which you plan to use the computer. Voltage, frequency, and plug
configurations vary.
WARNING!
To reduce the risk of electric shock, fire, or damage to the
equipment, do not attempt to power the computer with a voltage converter kit sold
for appliances.