Dell Latitude D531 (Mid 2007) - Manual (Page 146)

146 Specifications
Charge time (approximate) :
Computer on 2.5 hours
Computer off approximately 1 hour for 80 percent charge
Operating time varies depending on operating conditions and can be
significantly reduced under certain power-intensive
conditions.
See "Battery Performance" on page 29 for more
information.
Life span (approximate) 500 discharge/charge cycles
Temperature range:
Operating 0° to 35°C (32° to 95°F)
Storage –40° to 65°C (–40° to 149°F)
AC Adapter
Types
65 W and 90 W
Input voltage 90-264 VAC (65 W and 90 W)
Input current (maximum) 1.7 A (65 W and 90 W)
Input frequency 47–63 Hz (65 W and 90 W)
Output current:
65 W 4.34 A (maximum at 4-second pulse)
3.34 A (continuous)
90 W 5.62 A (maximum at 4-second pulse)
4.62 A (continuous)
Rated output voltage 19.5 VDC (65 W and 90 W)
Dimensions and weight:
Height 27.8.–28.6 mm (1.10–1.12 inches) (65 W)
33.8–34.6 mm (1.34–1.36 inches) (90 W)
Width 57.9 mm (2.28 inches) (65 W)
60.9 mm (2.39 inches) (90 W)
Length 137.2 mm (5.40 inches) (65 W)
153.4 mm (6.04 inches) (90 W)
Weight (without cables) 0.36 kg (0.79 lb) (65 W)
0.46 kg (1.01 lb) (90 W)
Battery (continued)