Lenovo ThinkPad R500 2716 User Manual page 79

Heat output
v 65 W (222 Btu/hr) maximum or 90W (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
– Capacity: 4.8 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