Dell Vostro 1540 (Mid 2011) - Manual (Page 83)

Battery
Voltage 11.1 VDC
Temperature range:
Operating 0 °C to 35 °C (32 °F to 95 °F)
Non-Operating –40 °C to 65 °C (–40 °F to 149 °F)
Coin-cell battery 3 V CR2032 lithium coin cell
AC Adapter
Type:
Vostro 1440 / Vostro 1450 / Vostro
1540 / Vostro 1550 with integrated
video card 65 W
Vostro 1440 with discrete video
card 65 W
Vostro 1450 with discrete video
card 90 W
Input voltage 100 VAC to 240 VAC
Input current (maximum) 1.50 A/1.60 A/1.70 A/2.10 A
Input frequency 50 Hz to 60 Hz
Output power 65 W and 90 W
Output current
65 W 3.34 A (continuous)
90 W 4.62 A
Rated output voltage 19.50 VDC (+/ 1.0 VDC)
Dimensions:
Height 28.20 mm (1.11 inches)
Width 57.90 mm (2.28 inches)
Depth 137.16 mm (5.40 inches)
Temperature range:
83