Dell D420 specifications Battery, AC Adapter

Fingerprint Reader (optional)

Type	UPEK TCS3 TouchStrip™ strip sensor with CMOS
	active capacitive pixel-sensing technology
Power Supply	2.7 V to approx. 3.6 V
Connector	48-ball BGA
Array Size	248 x 2 pixels
Type	UPEK TCS3 TouchStrip™ strip sensor with CMOS
	active capacitive pixel-sensing technology
Touch Pad
X/Y position resolution (graphics table mode)	240 cpi
Size:
Width	64.88 mm (2.55-inch) sensor-active area
Height	48.88-mm (1.92-inch) rectangle
Battery
Type	9-cell hybrid lithium ion (68 WHr)
	6-cell "smart" lithium ion (42 WHr)
	4-cell "smart" lithium ion (28 WHr) (optional)
Dimensions:
Depth	77.5 mm (3.05 inches)
Height	19.5 mm (0.76 inch)
Width	123.4 mm (4.86 inches)
Weight	0.32 kg (0.70 lb) (6 cell) 0.23 kg (0.52 lb) (4 cell)
Voltage	14.8 VDC (4 cell)
	11.1 VDC (6 cell)
	11.1 VDC (9 cell)
Charge time (approximate):
Computer off	approximately 1 hour for 80 percent charge for 4 and
	6 cell.
Operating time	varies depending on operating conditions and can be
	significantly reduced under certain power-intensive
	conditions.
	See Battery Performance for more information.
Life span (approximate)	300 discharge/charge cycles
Temperature range:
Operating	0° to 35°C (32° to 95°F)
Storage	–40° to 65°C (–65° to 149°F)
AC Adapter
Input voltage	100–240 VAC
Input current (maximum)	1.5 A
Input frequency	50–60 Hz
Output current	3.34 A (65-W AC adapter)
	4.62 A (90-W AC adapter)
Output power	65 W
	90 W
Rated output voltage	19.5 VDC
Dimensions and weight (65-W AC adapter):
Height	28.3 mm (1.11 inches)
Width	57.8 mm (2.28 inches)
Depth	137.2 mm (5.40 inches)
Weight (with cables)	0.36 kg (0.79 lb)
Dimensions and weight (90-W AC adapter):
Height	34.2 mm (1.35 inches)