ELECTRICALLY HEATED AEROSOL-GENERATING SYSTEM

A method of controlling a portable device of an electrical system is provided, the device including an electrically heated aerosol-generating device configured to receive an aerosol-generating substrate, the device further including a rechargeable power supply and at least one electrical heating element, the method including: monitoring an ambient temperature adjacent the device; and providing power to the heating element from the rechargeable power supply in dependence on the ambient temperature adjacent the device, such that when the ambient temperature adjacent the device is within a pre-determined temperature range, providing power to the heating element, and such that when the ambient temperature adjacent the device is below a lower end of the pre-determined temperature range, and when the ambient temperature adjacent the device is above a higher end of the pre-determined temperature range, preventing power being supplied to the heating element.