Lenovo M4400s notebook - Manual (Page 22)

• Fingerprint reader
Specifications
This topic lists the physical specifications for your computer.
Heat output
• 65 W (222 Btu/hr) or 90 W (307 Btu/hr) maximum heat output (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
8 User Guide