| 摘要 |
PURPOSE:To make the supply of power source to a portable radio telephone set possible by a battery of the similar shape by letting a mounting part of an external storage device be the same claw or groove as a mounting part of the portable radio telephone set. CONSTITUTION:The same claw and groove as those for a part of a battery 23 are provided on a engaging part of an external storage device 24 and the same claw and groove as those for the mounting part of the portable radio telephone set 25 are provided on the mounting part opposite to the engaging part. When the portable radio telephone set 25 does not use the external storage device 24, the battery 23 is mounted on the mounting part of the portable radio telephone set 25 and a power terminal of the mounting surface of the portable radio telephone set and the power terminal of the engaging surface of the battery are connected. Moreover, when the external device 24 is used, the external storage device 24 is mounted on the mounting part of the portable radio telephone set and the interface terminal and the power terminal on the mounting surface of the portable radio telephone set are connected to the interface terminal and the power terminal on the engaging surface of the external storage device, the battery 23 is mounted on the mount part of the external storage device 24 and the power terminal on the mounting surface of the external storage device 24 is connected to the power terminal on the engaging surface of the battery. |
