Battery charging device

The battery charging device obtains an open-circuit voltage at the time of 70% capacity based on information stored in a ROM of a battery package prior to the charge, and upon measuring an open-circuit voltage of the battery package by a voltage measuring portion, if this open-circuit voltage is higher than the obtained open-circuit voltage, a second indicator is switched ON to indicate that the remaining capacity is not less than 70% to thereby enable discrimination among batteries requiring charge or that do not prior to starting charging.