An aerosol delivery device comprising: a first elongated shell having a mouth end and an opposing joining end, the first elongated shell housing: a reservoir for an aerosol-forming composition: a heater; a liquid transport element configured for transport of the aerosol forming composition between the reservoir and the heater; and heater terminals (649a, 649b); a second elongated shell having a proximal end configured for connection with the joining end of the first elongated shell and having an opposing, distal end, the second elongated shell being divided into two separate halves (4201a, 4201b) along a longitudinal axis thereof; at least one battery positioned within the second elongated shell; and a base unit defined by at least one wall and having an open interior, the base unit comprising: a printed circuit board positioned at least partially within the open interior, the printed circuit board including a first contact configured for electrical connection with a terminal of the at least one battery, a second contact (431, 531) configured for electrical connection with an opposing terminal of the at least one battery, and first and second heater contacts (5106a, 5106b) configured for electrical connection with the heater terminals (649a, 649b); wherein the base unit comprises a first base section that has a first diameter and a second base section that has a second diameter that is less than the first diameter, the first diameter of the first base section is substantially similar to an inner diameter of the second elongated shell, and the first base section includes a first and a second heater terminal opening (427a, 427b) through which the heater terminals (649a, 649b) pass into the base unit; and wherein the joining end of the first elongated shell is connected to at least a portion of the base unit, and the proximal end of the second elongated shell is connected to at least a portion of the base unit. a first elongated shell having a mouth end and an opposing joining end, the first elongated shell housing: a reservoir for an aerosol-forming composition: a heater; a liquid transport element configured for transport of the aerosol forming composition between the reservoir and the heater; and heater terminals (649a, 649b); a heater; a liquid transport element configured for transport of the aerosol forming composition between the reservoir and the heater; and heater terminals (649a, 649b); a second elongated shell having a proximal end configured for connection with the joining end of the first elongated shell and having an opposing, distal end, the second elongated shell being divided into two separate halves (4201a, 4201b) along a longitudinal axis thereof; at least one battery positioned within the second elongated shell; and a base unit defined by at least one wall and having an open interior, the base unit comprising: a printed circuit board positioned at least partially within the open interior, the printed circuit board including a first contact configured for electrical connection with a terminal of the at least one battery, a second contact (431, 531) configured for electrical connection with an opposing terminal of the at least one battery, and first and second heater contacts (5106a, 5106b) configured for electrical connection with the heater terminals (649a, 649b); wherein the base unit comprises a first base section that has a first diameter and a second base section that has a second diameter that is less than the first diameter, the first diameter of the first base section is substantially similar to an inner diameter of the second elongated shell, and the first base section includes a first and a second heater terminal opening (427a, 427b) through which the heater terminals (649a, 649b) pass into the base unit; and a printed circuit board positioned at least partially within the open interior, the printed circuit board including a first contact configured for electrical connection with a terminal of the at least one battery, a second contact (431, 531) configured for electrical connection with an opposing terminal of the at least one battery, and first and second heater contacts (5106a, 5106b) configured for electrical connection with the heater terminals (649a, 649b); wherein the base unit comprises a first base section that has a first diameter and a second base section that has a second diameter that is less than the first diameter, the first diameter of the first base section is substantially similar to an inner diameter of the second elongated shell, and the first base section includes a first and a second heater terminal opening (427a, 427b) through which the heater terminals (649a, 649b) pass into the base unit; and wherein the joining end of the first elongated shell is connected to at least a portion of the base unit, and the proximal end of the second elongated shell is connected to at least a portion of the base unit.