Lenovo ThinkPad X220i (English) User Guide - Page 47

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