Dell Precision M20 - Manual (Page 105)

Keyboard
Number of keys 87 (U.S. and Canada); 88 (Europe); 91 (Japan)
Layout QWERTY/AZERTY/Kanji
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
Track Stick
X/Y position resolution (graphics table mode)
250 count/sec @ 100 gf
Size protrudes 0.5 mm higher than surrounding keycaps
Battery
Type 6-cell "smart" lithium ion (53 WHr) (standard)
4-cell "smart" lithium ion (32 WHr) (optional)
Dimensions:
Depth 88.5 mm (3.48 inches)
Height 21.5 mm (0.83 inch)
Width 139.0 mm (5.47 inches)
Weight 0.32 kg (0.7 lb) (6 cell) 0.25 kg (0.56 lb) (4 cell)
Voltage 14.8 VDC
Charge time (approximate):
Computer on 2.5 hours
Computer off 1 hour
Operating time varies depending on operating conditions and can be
significantly reduced under certain
power-intensive
conditions
See " Using a Battery " for more information on battery
life.
Life span (approximate) 300 discharge/charge cycles
Temperature range:
Operating 0° to 35°C (32° to 95°F)
Storage –20° to 65°C (–4° to 149°F)
AC Adapter
NOTE: The 90-W AC adapter is optional and may not ship with your computer.
Types 90 W and 65 W
Input voltage 90–264 VAC (both)
Input current (maximum) 1.7 A (both)
Input frequency 47–63 Hz (both)
Output current:
90 W 5.62 A (maximum at 4-second pulse); 4.62 A
(continuous)
65 W 4.34 A (maximum at 4-second pulse); 3.34 A
(continuous)
Output power 90 W or 65 W
Rated output voltage 19.5 VDC (both)
Dimensions:
Height 33.8–34.6 mm (1.34–1.36 inches) (90 W)
27.8–28.6 mm (1.10–1.12 inches) (65 W)
Width 60.9 mm (2.39 inches) (90 W)