A mobile terminal, including: a main body in which a semicircle-shaped, cell chamber with an opened end is provided, wherein one inner side of the cell chamber is provided with a plurality of groups of electrode contacts, and the other inner side of the cell chamber is provided with a plurality of sliding tracks at locations corresponding to the plurality of groups of electrode contacts, respectively; and a semicircle-shaped cell having one side provided with a plurality of groups of electrodes configured to be engaged with the electrodes, and the other side provided with a plurality of positioning tracks configured to be engaged with the sliding tracks. The mobile terminal allows replacing a cell in a switched-on state without opening a back cover of the main body.