Dell Inspiron 640M - Manual (Page 161)

Specifications
161
Battery
Type 6-cell "smart" lithium ion
9-cell "smart" lithium ion
Dimensions:
Depth 49 mm (1.93 inches) (6 cell)
60.1 mm (2.37 inches) (9 cell)
Height 24 mm (0.94 inch)
Width 206.8 mm (8.14 inches)
Weight 0.32 kg (0.7 lb) (6 cell)
0.48 kg (1.06 lb) (9 cell)
Voltage 11.1 VDC
Charge time (approximate) :
Computer off 2 hours (6-cell)
3 hours (9-cell)
Operating time Battery operating time varies depending on
operating conditions and can be significantly
reduced under certain power-intensive
conditions. See "Power Problems" on
page 96.
See "Using a Battery" on page 37 for more
information on battery life.
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)
Coin-cell battery CR-2032
AC Adapter
Input voltage 90–264 VAC
Input current (maximum) 1.5 A
Input frequency 47–63 Hz
Output current 4.34 A (maximum at 4-second pulse);
3.34 A (continuous)
Output power 65 W