| http://www.w3.org/ns/prov#value | - circuit of the PC as a power supply in performing a charging operation, a display means connected to the PC, an input means connected to the PC, a controller for causing the PC including the charger, to drive, an external power supply means for driving the PC, and a battery holding apparatus connected to the charger for holding a secondary cell, this secondary cell charging method having [0160] a
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