AN AEROSOL-GENERATING DEVICE (100) COMPRISES A HEATING ELEMENT (406) AND AN EXTERNAL HOUSING (500, 502). THE EXTERNAL HOUSING IS ELONGATE AND IS ADAPTED TO RESIST ROLLING. AN AEROSOL GENERATING SYSTEM COMPRISES THE AEROSOL-GENERATING DEVICE AND A CHARGING DEVICE (600) HAVING A CAVITY (302) CONFIGURED TO RECEIVE THE AEROSOL-GENERATING DEVICE. FIGURE 1