A ball toy 10 intended for use by pets that is molded of a flexible, resilient material, containing a hollow cavity inside 22. The separating includes directing the RFID circuit onto a transfer drum of the placement device and separably coupling the RFID circuit to the transfer drum. The monitor apparatus receives the result and judges on the basis of the result whether the automatic charging apparatus is in an anomalous state. The pump connection or the tank connection is selectively joined to the appliance connection via a connecting line according to the position of the piston.