A processing device may comprise a first controlling unit, a second controlling unit, a first memory and a second memory. The support member is preferably shaped to receive the cylindrical item in a seated position and the EAS marker may be supported within the support member such that is sandwiched between the support member and the cylindrical article during use. A wireless transceiver is associated with the remote dispensing device and another wireless transceiver is associated with the main purification unit. At this point, the guide wire is advanced through the stylet and into the vasculature until the distal end of the guide wire arrives at a chosen location. When the battery charger operates under the constant current mode, the comparison result controls a charging mode transition from the constant current mode to a constant voltage mode. Therefore, the safety concerns are reduced, the operations are simplified, and the probable of inputting improper control parameters is eliminated.