Dell Alienware M17x R4 (Early 2012) - Manual (Page 6)

AC adapter connector
Type 240 W
Input voltage 100-240 VAC
Input current (maximum) 3.50 A
Input frequency 50-60 Hz
Output current 12.30 A (continuous)
Output power 250 W
Rated output voltage 19.5 VDC
Temperature range
Operating 0° to 40°C (32° to 104°F)
Storage –40° to 70°C (–40° to 158°F)
Connector types
DC connector 3-pin, 7.4 mm plug
AC connector 3-pin – C13 (240 W)
Battery
9-cell “smart” lithium ion (90 Whr)
Height / Width
22 mm (0.87 inches) / 233 mm (9.17 inches)
Depth 90 mm (3.54 inches)
Weight 0.52 kg (1.14 lb)
Voltage 11.10 VDC
Operating time battery operating time varies depending on
operating conditions and can be significantly
reduced under certain power-intensive conditions
Life span (approximate) 300 discharge/charge cycles
Temperature range
Operating 0° to 50°C (32° to 122°F)
Storage –20° to 60°C (–4° to 140°F)
Coin-cell battery CR-2032