An electronic vaping device (60) includes a cartomizer (70) and a battery section (72). The cartomizer (70) includes a housing (6), a liquid supply reservoir (22) in the housing (6), a vaporizer connected to the liquid supply reservoir (22), and a channel (9) adjacent to the liquid supply reservoir (22). The liquid supply reservoir (22) is configured to store vapor precursor. The vaporizer includes a fluid-transport structure that is configured to transport the vapor precursor from the liquid supply reservoir (22) to the channel (9). The battery section (72) is configured to provide power to the vaporizer. The battery section (72) includes a control circuit (35) that is configured to determine a saturation level of the vapor precursor on the fluid-transport structure based on an electrical resistance of the fluid-transport structure.
