| http://www.w3.org/ns/prov#value | - hing a block to be energized, and the like, performs detection of presence or absence of insertion of a battery, a type of a battery and a residual amount of a battery, controls the DC-DC converter based on a detection result and an instruction of the system control circuit 50, and supplies a necessary voltage to each unit including a recording medium for a necessary period; connectors 82 and 84;
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