User Guide - Lenovo

Battery pack
• Lithium-ion (Li-Ion) battery pack
Battery life
• For percentage of remaining battery power, see the Power Manager Battery Gauge in the task bar.
• The Power Manager also displays a green, yellow and red indication. A battery under warranty with a red
indication is eligible for a warranty replacement.
ThinkPad X220 Tabet and X220i Tablet specifications
Size
• Width: 305.0 mm (12 inch)
• Depth: 228.7 mm (9 inch)
• Height: 27 to 31.3 mm (1.06 inch to 1.23 inch)
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)
– Non-operating: 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 pack, its temperature must be at least 10 °C (50 °F).
• Relative humidity:
– Operating: 8% to 80%
– Non-operating: 5% to 95%
Heat output
• 65 W (222 Btu/hr) maximum, or 90 W (307 Btu/hr) maximum, depending on the model
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 pack
• Lithium-ion (Li-Ion) battery pack
Battery life
• For percentage of remaining battery power, see the Power Manager Battery Gauge in the task bar.
• The Power Manager also displays a green, yellow and red indication. A battery under warranty with a red
indication is eligible for a warranty replacement.
Chapter 1. Product Overview 31