Compaq Armada e500 - Notebook PC Quick Reference Manual page 120

If you expect to encounter climatic extremes, review the
operating environment guidelines in Appendix D.
If you are traveling internationally:
!
Consult with a Compaq authorized dealer, reseller, or
service provider about power cord and adapter requirements
for each location in which you plan to use the computer.
(Voltage, frequency, and plug configurations vary.) To
contact a Compaq authorized dealer, reseller, or service
provider near you, refer to "Worldwide Telephone
Numbers" in Appendix A.
Check the computer-related Customs regulations for each
country on your itinerary.
12-6 Maintenance and Travel Guidelines
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.