POWER MANAGEMENT: APM Support Suspend and SmartSleep 3 - 4 hours battery life with Lithium Ion battery pack (HOT SWAP) BATTERY: Chip Set: Intel 80C51SL for battery management. Charge time: Approx. 2.5 hours (system off), Approx. 5 hours (system on) Dimensions: 3.25" W x 7.25" D x 0.75" H Normal open circuit voltage 10.8 V DC Capacity: 4050 mAHR, 43.7 watts Hr NiMH Li-Ion Battery Capacity 2.8AH@10.8V 4.05AH@10.8V Battery weight 20.2oz 15.08oz Charge time (on) 4hr(to 90%) 5hr(to90%) Charge time (off) 2hr(to90%) 2.5hr(to 90%) Battery life 350 cycles 500 cycles Charge temp 0-40C 0-40C Discharge temp 0-50C 0-50C AC ADAPTER: Input Voltage: Full-range: 100-240 VAC Dimensions: 2.36" W x 4.13" D x 1.1" H (6.0cm W x 10.5cm D x 2.8cm H) Weight: 0.57lbs. (0.26kg) Line frequency: 47Hz - 63Hz Steady state power: 34.2W Input current: 1A 115VAC - 0.5A 230VAC Output voltage: 18VDC Output current: 1.9A