| 摘要 |
A secondary battery pack includes terminals connected to an external device, a rechargeable battery for storing and utilizing electric charges, a switching circuit for switching a state of the rechargeable battery between a charge state and a discharge state, a charge/discharge state detecting circuit for detecting a mode signal indicating that a charge operation or a discharge operation is to be carried out, a control circuit for controlling an operation of the switching circuit, a first power-source switching circuit which switches a supply of a power source to the control circuit and is controlled in response to a mode detected by the charge/discharge state detecting circuit, and a second power-source switching circuit which switches a supply of a power source to the control circuit and is controlled in response to a mode detected by the charge/discharge state detecting circuit.
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