| 摘要 |
PROBLEM TO BE SOLVED: To use a battery economically in safety until the lifetime expires completely by providing a reverse current prevention diode and operating it in parallel with an inexpensive battery of different type. SOLUTION: A main battery (1) reaching the replacement time can be operated in parallel with a battery (2) of different type through a reverse current prevention diode (3). COPYRIGHT: (C)2005,JPO&NCIPI
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