Specifications; Operating Environment - Lenovo ThinkPad L540 User Manual

Security feature
• Fingerprint reader (on some models)

Specifications

Size
• For ThinkPad L440
– Width: 344 mm (13.5 inches)
– Depth: 239 mm (9.4 inches)
– Height: 37.15 mm (1.47 inches)
• For ThinkPad L540
– Width: 377 mm (14.8 inches)
– Depth: 247 mm (9.7 inches)
– Height: 37.05 mm or 39.25 mm (1.45 inches or 1.54 inches)
Heat output
• 65 W (222 Btu/hr) maximum
• 90 W (307 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
Battery status
• For the percentage of the battery power remaining, check the battery status icon in the Windows
notification area.

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 battery, its 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℉)
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Chapter 1 Product overview
19