Charging device and rechargeable power tool set

A charging device for use in charging plural types of secondary batteries, comprising:

• a power source unit for supplying a charging current to an object secondary battery;
• a blowing unit for blowing an air to the object secondary battery;
• a battery type signal receiving unit for receiving a battery type signal indicative of a type of the object secondary battery;
• a battery temperature signal receiving unit for receiving a battery temperature signal indicative of a temperature of the object secondary battery;
• a storage unit for storing reference judging temperatures for determination of charging-incongruent temperatures of the plural types of secondary batteries, in a matching relationship with the types of the secondary batteries;
• and
• a control unit for allowing the blowing unit to perform a blowing operation, if the temperature of the object secondary battery represented by the battery temperature signal received by the battery temperature signal receiving unit exceeds a reference judging temperature stored in the storage unit in a matching relationship with the type of the object secondary battery that is represented by the battery type signal received by the battery type signal receiving unit, and for causing the blowing unit to stop the blowing operation, if otherwise.