Dell Inspiron 14 (3420, Mid 2012) - Manual (Page 5)

Touchpad
X/Y position resolution
(graphics table mode) 240 cpi
Size
Height 46.00 mm (1.81 inches) sensor-active area
Width 90.00 mm (3.54 inches) sensor-active area
Battery
6-cell “smart” lithium ion
Height 20.20 mm (0.80 inch)
Width 208.36 mm (8.20 inches)
Depth 56.52 mm (2.23 inches)
Weight 0.33 kg (0.73 lb)
Voltage 11.1 VDC
Charge time
(approximate) 4 hours (when the computer is turned off)
Operating time battery operating time varies depending on
operating conditions and may reduce significantly
under certain power-intensive conditions
Coin-cell battery CR-2032
Camera
Camera resolution
Inspiron 14-N4050/
M4040 1.3 megapixel
Inspiron 3420 1.0 megapixel
Video resolution
(maximum)
Inspiron 14-N4050/
M4040 640 x 480 at 30 fps
Inspiron 3420 1280 x 720 at 30 fps (HD)