Abstract: First display (4) comprising a liquid crystal display is provided on the external surface of the first case body (1). In the near proximity of the first display (4), a non-voice radio communications service start button (5), scroll buttons (6a), (6b), and a selection/decision button (7) are provided. On the internal surface of the first case body (1), the second display 8, on the side of which is provided an antenna 9 retractable slantwise, is provided. In the first case body (1) is embedded a magnet (18) and in the second case body (2) is embedded a lead switch (19). When the main unit is folded to bring the magnet (18) in close proximity to the lead switch (19), the lead switch is turned ON. When the main unit is unfolded to place the magnet (18) apart from the lead switch (19), the lead switch is turned OFF. This allows detection of folding/unfolding of the case body.

Abstract: A first display (4) comprising a liquid crystal display is provided on the outer surface of a first case body (1). In the near proximity of the first display (4), a call start button (5), a call release button (6), and a so-called navigation key (7) having an arrow key for scrolling in four directions and a center key for selecting and determining target information. A second display (8) is provided on the inner surface of the first case body (1). An antenna 9 is provided retractable slantwise on the side of the second case body (2). A magnet (18) is embedded in the first case body (1), and a lead switch 19 is embedded in the second case body (2). When the main body is folded to bring the magnet (18) in close proximity to the lead switch (19), the lead switch is turned ON. When the main body is unfolded to place the magnet (18) apart from the lead switch (19), the lead switch is turned OFF. This allows detection of folding/unfolding of the main body.

Abstract: There is provided a battery pack with a water leakage detecting seal comprising a protective circuit 5 for protecting a battery, a first case 6, a second case 7, and a battery cell 8, characterized in that the water leakage detecting seal 2 is arranged adjacent to the protective circuit 5 for protecting the battery in the rear of a window 3 formed in the first case 6 in such a way that the water leakage detecting seal 2 is sandwiched between the first case 6 and the second case 7.