HP Pavilion dv7-4200 Notebook Essentials - Windows 7 - Page 47

Appendix B: Specifications Operating environment The operating environment information in the following table may be helpful if you plan to use or transport the computer in extreme environments. Factor Temperature Operating (writing to optical disc) Nonoperating Relative humidity (noncondensing) Operating Nonoperating Maximum altitude (unpressurized) Operating Nonoperating Metric U.S. 5°C to 35°C -20°C to 60°C 41°F to 95°F -4°F to 140°F 10% to 90% 5% to 95% 10% to 90% 5% to 95% -15 m to 3,048 m -50 ft to 10,000 ft -15 m to 12,192 m -50 ft to 40,000 ft Input power The power information in this section may be helpful if you plan to travel internationally with the computer. The computer operates on DC power, which can be supplied by an AC or a DC power source. Although the computer can be powered from a standalone DC power source, it should be powered only with an AC adapter or a DC power source supplied and approved by HP for use with this computer. The computer is capable of accepting DC power within the following specifications. Input power Rating Operating voltage 18.5 V dc or 19.0 V dc Operating current 3.5 A, 4.74 A, or 6.50 A ✎ This product is designed for IT power systems in Norway with phase-to-phase voltage not exceeding 240 V rms. ✎ The computer operating voltage and current can be found on the system regulatory label on the bottom of the computer. Notebook Essentials 41