A vaporizer comprising: a shell having a battery segment and a cartomizer receiving segment, the cartomizer receiving segment defining a chamber having an insertion end distal from the battery segment and a base end proximate to the battery segment; a cartomizer insertable into the chamber at the insertion end, the cartomizer including: a cartomizer body dimensioned to hold a vaporizable substance, a heating element provided within the cartomizer body operable to heat the vaporizable substance, the heating element being positioned within the chamber when the cartomizer is inserted in the chamber; cartomizer electrical contacts provided on the exterior of the cartomizer, cartomizer electrical circuitry operable to direct an electronic current between the cartomizer electrical contacts and the heating element, and a mouthpiece provided on the cartomizer body at or proximate to a mouthpiece end which is opposite an insertion end of the cartomizer, the mouthpiece extending from the insertion end of the chamber when the cartomizer is inserted in the chamber, wherein the heating element is activated by the current and is operable to heat the vaporizable substance to a vaporization temperature; a battery housed within the battery segment; battery electrical contacts provided between the base end of the chamber and the battery segment, the battery electrical contacts positioned to contact the cartomizer electrical contacts when the cartomizer is inserted in the chamber; and battery electrical circuitry housed within the battery segment and operable to direct an electrical current between the battery, the battery electrical contacts, the cartomizer electrical contacts, and the heating element when the cartomizer is inserted in the chamber. a shell having a battery segment and a cartomizer receiving segment, the cartomizer receiving segment defining a chamber having an insertion end distal from the battery segment and a base end proximate to the battery segment; a cartomizer insertable into the chamber at the insertion end, the cartomizer including: a cartomizer body dimensioned to hold a vaporizable substance, a heating element provided within the cartomizer body operable to heat the vaporizable substance, the heating element being positioned within the chamber when the cartomizer is inserted in the chamber; cartomizer electrical contacts provided on the exterior of the cartomizer, cartomizer electrical circuitry operable to direct an electronic current between the cartomizer electrical contacts and the heating element, and a mouthpiece provided on the cartomizer body at or proximate to a mouthpiece end which is opposite an insertion end of the cartomizer, the mouthpiece extending from the insertion end of the chamber when the cartomizer is inserted in the chamber, wherein the heating element is activated by the current and is operable to heat the vaporizable substance to a vaporization temperature; a cartomizer body dimensioned to hold a vaporizable substance, a heating element provided within the cartomizer body operable to heat the vaporizable substance, the heating element being positioned within the chamber when the cartomizer is inserted in the chamber; cartomizer electrical contacts provided on the exterior of the cartomizer, cartomizer electrical circuitry operable to direct an electronic current between the cartomizer electrical contacts and the heating element, and a mouthpiece provided on the cartomizer body at or proximate to a mouthpiece end which is opposite an insertion end of the cartomizer, the mouthpiece extending from the insertion end of the chamber when the cartomizer is inserted in the chamber, wherein the heating element is activated by the current and is operable to heat the vaporizable substance to a vaporization temperature; a battery housed within the battery segment; battery electrical contacts provided between the base end of the chamber and the battery segment, the battery electrical contacts positioned to contact the cartomizer electrical contacts when the cartomizer is inserted in the chamber; and battery electrical circuitry housed within the battery segment and operable to direct an electrical current between the battery, the battery electrical contacts, the cartomizer electrical contacts, and the heating element when the cartomizer is inserted in the chamber.