An aroma diffuser assembly includes a housing (202) providing a cavity for receiving aroma producing material, heating means within the housing for effecting the release of an aroma from the aroma producing material, and power supply means for supply power to the heating means. The power supply means has a first portion for electrical connection to an external power source. The power supply means also includes a second portion (264, 270) having connecting means (268, 272) for supplying power from the external power source through the housing (202) to an external power consuming apparatus when engaged with the connecting means, the power being supplied to the connecting means independent of the supplying of the power to the heating means. The aroma diffuser assembly is also characterized in that the power supply means (260) is rotatable between a first position and a second position to maintain the housing (202) in a preselected orientation, the power supply means (260) being shiftable with respect to the housing (202) between a first location in which the power supply means is prevented from rotation and a second location in which the power supply means is rotatable.