Lenovo ThinkPad X23 English - ThinkPad X23 Service and Troubleshooting guide - Page 15

Your ThinkPad at a glance - Non-operating: -20°C to 60°C (-4°F to 140°F) Note: When you charge the battery pack, its temperature must be at least 10°C (50°F). Relative humidity: - Operating: 8% to 90% - Non-operating: 5% to 95% Maximum altitude: 3048 m (10,000 ft.) in unpressurized conditions - Maximum temperature at 3048 m (10,000 ft.): 31°C (88°F) Electrical (AC Adapter) Sine-wave input, at 50 to 60 Hz is required The input rating of the AC Adapter: 100-240 V ac, 50/60 Hz Lithium-ion battery pack Nominal voltage 14.4 V dc 10.8 V dc Capacity 1.8 AH 3.9 AH Caring for your ThinkPad computer Though your computer is designed to function reliably in normal work environments, you need to use common sense in handling it. By following these important tips, you will get the most use and enjoyment out of your computer. Important tips: Be careful about where and how you work v Do not leave the base of your computer in contact with your lap or any part of your body for an extended period when the computer is functioning or when the battery is charging. Your computer dissipates some heat during normal operation. This heat is a function of the level of system activity and battery charge level. Extended contact with your body, even through clothing, could cause discomfort or, eventually, a skin burn. v Place liquids away from your computer to avoid spills, and keep your computer away from water (to avoid the danger of electrical shock). v Store packing materials safely out of the reach of children to prevent the risk of suffocation from plastic bags. v Keep your computer away from magnets, activated cellular phones, electrical appliances, or speakers (within 13cm/5 in). Chapter 1. Overview of your new ThinkPad computer 5