Patent ID: 7205745

Claim:
A portable power source system comprising a battery pack for accommodating at least one secondary battery and a mounting part for mounting said battery pack, said mounting part being disposed in power using equipment, said battery pack comprising a charge circuit having a charge terminal and a discharge circuit having a discharge terminal, and said charge circuit comprising a control circuit for controlling a voltage and a current during charging, said mounting part comprising a protruding external terminal for connecting with said discharge terminal, said battery pack comprising an inserting part for inserting said external terminal, and said discharge terminal being disposed in a concealed position inside said inserting part, said battery pack being movable from an initial position to a fixing position while said external terminal has been inserted in said inserting part, and connection between said external terminal and said discharge terminal being achieved at said fixing position, and said battery pack being movable from the initial position to the fixing position in a direction different from the inserting direction.