Lenovo 2765PAU - ThinkPad T400 14.1" Notebook, Service Manual, Page: 79 / 94

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).
v
Relative humidity:
– Operating: 8% to 80%
– Non-operating: 5% to 95%
Heat output
v
65 W (222 Btu/hr) maximum or 90 W (307 Btu/hr) maximum (depending
on the model)
Power source (AC adapter)
v
Sine-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
Lithium-ion (Li-Ion) battery pack
– Nominal voltage: 10.8 V DC or 14.4 V DC, depending on the model
– Capacity: 2.6 AH, 5.2 AH or 7.8 AH, depending on the model
Battery life
v
For percentage of remaining battery power, see the Power Manager Gauge
on the task bar.
Appendix C. Features and Specifications
71