Lenovo ThinkPad A21e English - A21e(2655) Service and Troubleshooting Guide - Page 13
Features, Specifications - battery
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Specifications Specifications Size v Width: 304.8 mm (12.0 in.) v Depth: 254.0 mm (10.0 in.) v Height: 35.6 mm (1.4 in.) Environment v Maximum altitude without pressurization: 3048 m (10,000 ft) v Temperature - At altitudes up to 2438 m (8000 ft) - Operating with no diskette: 5° to 35°C (41° to 95°F) - Operating with a diskette: 10° to 35°C (50° to 95°F) - Not operating: 5° to 43°C (41° to 110°F) - At altitudes above 2438 m (8000 ft) - Maximum operating temperature, 31.3°C (88° F) Note: When you charge the battery pack, its temperature must be at least 10°C (50°F). v Relative humidity: - Operating with no diskette in the drive: 8% to 95% - Operating with a diskette in the drive: 8% to 80% Heat output v 72 W (246 Btu/hr) maximum Electrical (ac adapter) v Sin-wave input at 50 to 60 Hz v Input rating of the ac adapter: 100-240 V ac, 50 to 60 Hz Battery pack v Nickel Metal Hydride (NiMH) battery pack - Nominal voltage: 8.4 V dc - Capacity: 4.5 AH Chapter 1. Overview of your new ThinkPad computer 5