A toner cartridge for use in an image forming device, comprising: a housing having a top, a bottom, a front and a rear positioned between a first side and a second side of the housing, the housing has a reservoir for holding toner; a developer roll rotatably positioned on the housing, a portion of an outer surface of the developer roll is exposed along the front of the housing for supplying toner from the reservoir to a corresponding photoconductive drum; an interface gear on the first side of the housing rotatably coupled to the developer roll, at least a portion of the interface gear is exposed at the front of the housing for mating with a corresponding drive gear and receiving rotational force from the corresponding drive gear; a first alignment guide extending outward from the first side of the housing and a second alignment guide extending outward from the second side of the housing for positioning the toner cartridge; a first electrical contact on the second side of the housing for contacting a first corresponding electrical contact in the image forming device, the first electrical contact of the toner cartridge is electrically connected to processing circuitry mounted on the housing; and a second electrical contact on the second side of the housing for contacting a second corresponding electrical contact in the image forming device, the second electrical contact of the toner cartridge is electrically connected to the developer roll, the second electrical contact of the toner cartridge is positioned higher than the developer roll and the interface gear and is positioned closer to the rear of the housing than the developer roll and the interface gear are to the rear of the housing, the second electrical contact of the toner cartridge is positioned higher than the first and second alignment guides and is positioned closer to the rear of the housing than the first and second alignment guides are to the rear of the housing, the second electrical contact of the toner cartridge is positioned higher than the first electrical contact of the toner cartridge. a housing having a top, a bottom, a front and a rear positioned between a first side and a second side of the housing, the housing has a reservoir for holding toner; a developer roll rotatably positioned on the housing, a portion of an outer surface of the developer roll is exposed along the front of the housing for supplying toner from the reservoir to a corresponding photoconductive drum; an interface gear on the first side of the housing rotatably coupled to the developer roll, at least a portion of the interface gear is exposed at the front of the housing for mating with a corresponding drive gear and receiving rotational force from the corresponding drive gear; a first alignment guide extending outward from the first side of the housing and a second alignment guide extending outward from the second side of the housing for positioning the toner cartridge; a first electrical contact on the second side of the housing for contacting a first corresponding electrical contact in the image forming device, the first electrical contact of the toner cartridge is electrically connected to processing circuitry mounted on the housing; and a second electrical contact on the second side of the housing for contacting a second corresponding electrical contact in the image forming device, the second electrical contact of the toner cartridge is electrically connected to the developer roll, the second electrical contact of the toner cartridge is positioned higher than the developer roll and the interface gear and is positioned closer to the rear of the housing than the developer roll and the interface gear are to the rear of the housing, the second electrical contact of the toner cartridge is positioned higher than the first and second alignment guides and is positioned closer to the rear of the housing than the first and second alignment guides are to the rear of the housing, the second electrical contact of the toner cartridge is positioned higher than the first electrical contact of the toner cartridge.