Embodiments of the present invention comprise geometric features in the fluid interconnect region of an ink container which inhibit residual ink from contacting a removable seal on the container or the fingers and clothing of the container installer. The existing disc-related information and recording-related information are recorded, and the updated disc-related information and recording-related information is recorded in an area in which the existing disc-related information and recording-related information is recorded. The route switching device switches a current supply route from the battery to a motor to either one of a first route by which the constant voltage on the secondary side from the constant voltage circuit is supplied from the battery, and a second route by which the primary-side voltage is supplied without passing through the constant voltage circuit. An extension nozzle forming an extension channel having a tubular insulator along at least a portion of its interior surface is affixed to the anode end of the device.