Abstract: The present invention is a portable electronic vapor-producing device which converts chemical substances in liquid form to a gaseous form so that active ingredient(s) can be inhaled by the user for therapeutic or medicinal purposes. The device includes: a power module; a primary module; and an auxiliary module that may be enclosed separately in exterior hollow casings and fitted together, or enclosed together in one single exterior hollow casing. The primary module includes: an anode assembly; a cask assembly; and a heater assembly. The anode assembly includes an anode barrel, which is hollow, fixed permanently in place and contacts the battery; a cathode mount, which is fixed permanently in place and contacts the heater assembly; and an anode mount, which moves between contacting the and not contacting the cathode.