A unique teardown by iFixit of the iPad 2's Smart Cover and its match-up in the iPad has revealed a more elaborate system than many first thought. The two use a total of 31 magnets, 21 in the cover and 10 in the iPad itself, and are in a more layout than some might initially suspect. Only one round magnet in the cover, and a corresponding sensor, turns the display on or off; the rest are used to keep the iPad in place and help keep the cover folded up when used as a stand.
