Lenovo 100w Gen 3 User Manual page 50

Note: When you charge the battery, its temperature must be no lower than 10°C (50°F).
Relative humidity
• Operating: 8% to 95% at wet-bulb temperature 23°C (73°F)
• Storage: 5% to 95% at wet-bulb temperature 27°C (81°F)
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Lenovo 100w Gen 3/300w Gen 3/500w Gen 3 User Guide