Specifications; Operating Environment - Lenovo ThinkPad X250 User Manual

• Integrated wireless LAN
• Global Positioning System (GPS) satellite receiver (available on models with wireless WAN)
• Integrated wireless WAN (available on some models)
Security feature
• Fingerprint reader (available on some models)

Specifications

Size
• Width: 305.5 mm (12 inches)
• Depth: 208.5 mm (8.2 inches)
• Height: 20.3 mm (0.8 inch) or 21.5 mm (0.8 inch)
Heat output
• 45 W (154 Btu/hr) maximum
Power source (ac power adapter)
• Sine-wave input at 50 to 60 Hz
• Input rating of the ac power adapter: 100 to 240 V ac, 50 to 60 Hz

Operating environment

This section provides information about the operating environment of the computer.
Environment
• Maximum altitude without pressurization: 3048 m (10 000 ft)
• Temperature
– At altitudes up to 2438 m (8000 ft)
– Operating: 5.0°C to 35.0°C (41°F to 95°F)
– Storage: 5.0°C to 43.0°C (41°F to 109°F)
– At altitudes above 2438 m (8000 ft)
Maximum temperature when operating under the unpressurized condition: 31.3°C (88°F)
Note: When you charge the batteries, the temperature must be at least 10°C (50°F).
• Relative humidity:
– Operating: 8% to 95% at wet bulb: 23℃ (73℉)
– Storage: 5% to 95% at wet bulb: 27℃ (81℉)
If possible, place your computer in a well-ventilated and dry area without direct exposure to sunshine.
Attention: Keep electrical appliances such as an electric fan, radio, high-powered speakers, air conditioner,
and microwave oven away from your computer. The strong magnetic fields generated by electrical
appliances can damage the motor and data on the storage drive.
Do not place any beverages on top of or beside the computer or other attached devices. If liquid is spilled on
or in the computer or an attached device, a short circuit or other damage might occur.
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User Guide