To reduce a sense of incompatibility, when a portable apparatus is carried and to drive it for a long period by connecting multiple split thin cells in parallel or in series in a belt shape.

Thin cells 1 are connected by positive electrode terminal junctions 2 and negative electrode terminal junctions 3 at interval sections between the cells 1, and the positive electrode and negative electrode terminal junctions 2, 3 are insulation-coated after being terminal connected. Belt fitting hooks 5 are provided at both the ends and the center section of a battery fitting substrate 4, so that the battery can be easily fitted to a clothes belt. A power- extracting connector 6 is fitted to one end of the battery fitting substrate 4 so that a connector inserting direction is set upward. By a portable apparatus side is connected to this connector insertion port, the apparatus such as a portable telephone is operated.