| 摘要 |
PURPOSE: To provide, as a portable telephone power source, a primary battery- used packed battery which has compatibility with a secondary battery-used packed battery, having a change preventing diode connected to an internal electronic circuit, and having a plurality of air holes on a resin case. CONSTITUTION: In a packed battery for portable telephone power source, air permeable porous water repelling film 3 never passing water is provided inside a plurality of air holes provided on the side surface of a facing resin case 1. The case 1 is vertically opened and closed, an air-zinc type battery (AA battery) 4 is replaced as occasion demands, a large capacity can be attained with light weight. Since a diode 7 is set between the external terminal 5 and internal terminal 6 on the positive electrode side, the packed battery in which a primary battery is installed is never charged when set to a battery charger. As a double countermeasure to charge prevention, a thermosensitive element or thermal fuse 8 may be connected in series to the diode. The appearance color tone of the packed battery 4 is set to yellow, orange, green or white which is opposite colors to the black or gray of the secondary battery pack. |
