Dell Precision M4400 (Mid 2008) - Manual (Page 28)

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Specifications
Touch Pad
X/Y position resolution
(graphics table mode) 240 cpi
Size:
Width 65.8-mm (2.59-inches) sensor-active area
Height 38.5-mm (1.52-inches) rectangle
Battery
Types 6-cell "smart" lithium ion
9-cell "smart" lithium ion
12-cell "smart" polymer slice
Voltage 11.1 VDC
Dimensions, 6-cell lithium-ion batteries:
Depth 206 mm (8.11 inches)
Height 19.8 mm (0.78 inch)
Width 47.0 mm (1.85 inches)
Weight 0.33 kg (0.73 lb)
Dimensions, 9-cell lithium-ion batteries:
Depth 208 mm (8.67 inches)
Height 22.3 mm (0.88 inch)
Width 68.98 mm (2.70 inches)
Weight 0.51 kg (1.12 lb)
Dimensions, 12-cell slice batteries:
Depth 14.48 mm (0.57 inch)
Height 217.24 mm (8.55 inches)
Width 322.17 mm (12.68 inches)