A terminal and a method for charging and discharging is described. The terminal includes a first hardware system and a second hardware system. The first hardware system includes a first processing unit, a first charging unit, a first switching unit, and a first battery unit. The second hardware system includes a second processing unit and a second battery unit. On the basis of a first status information piece and/or a second status information piece, the first processing unit controls the first charging unit to charge the first battery unit and/or the second battery unit via the first switching unit, or, the first processing unit controls the first switching unit to select the first battery unit or the second battery unit to supply the first hardware system with electricity.