Steam feed system includes: that pick-and-place components (cartomiser) include that evaporator generates steam from vapor precursor material for sucking by users operation With device feature (control unit), including power supply, such as battery is established in cartridge part by electric interfaces for providing vaporizer, is used with device feature in cartridge part and device feature. Electrical interface is provided through spring catch in cartridge part and device feature, with circuit board contacts pad and another cartridge part, with device portion, the spring catch and contact weld pad are arranged to cooperative stores alignment, so that each spring catch is in the corresponding multiple engagement pads of offsettingly contact and uses in cartridge part and device feature.
