Patent ID: 8714150

Claim:
An electronic cigarette comprising: a first cartridge comprising a first release device configured to release a first substance into a housing, wherein the first cartridge fixably located completely within the housing; a sensor; a controller configured to: receive data from the sensor; determine an amount of the first substance released by the first cartridge based on the data; and estimate a remaining amount of the first substance in the first cartridge based on the determined amount of the first substance; and a display, wherein the controller is further configured to: estimate at least one of: a number of puffs remaining, a number of cigarette equivalents remaining, or a number of cigar equivalents remaining based on the estimated remaining amount of the first substance; and wherein the display is configured to display an indication of at least one of the number of puffs remaining, the number of cigarette equivalents remaining, or the number of cigar equivalents remaining.