| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a secondary battery pack whose state can be indicated without increasing the size of the exterior. Ž<P>SOLUTION: When the secondary battery pack 1 is mounted on a charger 2, a N-pole portion 24a, a N-pole portion 25a, and a N-pole portion 26a of a magnet E24, a magnet M25, and a magnet F26 come close to an E indication part 12, an M indication part 13, and an F indication part 14, respectively. When a magnetic body S-pole portion 5b of a magnetic body 5 is attracted to the surface, a full-charge indication that the capacity is 100-75% appears in a color applied to the magnetic body S-pole portion 5b. When the secondary battery pack 1 is mounted on a digital camera 3, the digital camera 3 calculates the battery capacity of the second battery pack 1. When a detecting switch 40 detects that a battery cover 31 is opened, the digital camera 3 operates to select the E indication part 12, the M indication part 13, or the F indication part 14 depending on the battery capacity. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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