I still get confused sometimes at the name MagSafe. Has it anything to do with the magnet in it? Why MagSafe? is it safer than other adapters?
This is well answered by Wikipedia’s article on MagSafe.
Summary: to obviate expensive repairs to connectors and laptops when users tripped over their power cords, Apple designed a connector that would stay connected mag-netically under normal circumstances, but which would safe-ly disconnect when the power cords (or laptops) were suddenly pulled away.