Lenovo ThinkPad X121e (English) User Guide - Page 30

• Width: 282 mm (13.32 inches) • Depth: 204 mm (9.64 inches) • Height: 24 mm (1.13 inches) Heat output • 65 W (222 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 pack • Lithium-ion (Li-Ion) battery pack Battery life • For the 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. Operating environment This section provides information about your computer operating environment. 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 pack, its temperature must be at least 10°C (50°F). • Relative humidity: - Operating: 8% to 80% - Storage: 5% to 95% If possible, place your computer in a well-ventilated and dry area without direct exposure to sunshine. Keep electrical appliances such as an electric fan, radio, high-powered speakers, air conditioner, and microwave oven away from your computer because the strong magnetic fields generated by these appliances can damage the monitor and data on the hard disk drive or solid state 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. Do not eat or smoke over your keyboard. Particles that fall into your keyboard can cause damage. 14 User Guide