An electronic cigarette vaporiser system operable in a 'power' mode to increase the amount of vapour produced by a vaporiser that forms part of the system compared to normal, whilst monitoring the temperature of a heating element in the vaporiser to ensure that excessively high temperatures, associated with undesirable compounds in the vapour produced by the heating element, are not reached. The system may include a button or sensor that alters the operation of the heating element in such a way as to increase the vapour produced, and this button may be on the vaporiser or a connected device, such as a smartphone or vaporiser case. The vaporiser itself may include no buttons. The power mode may alter the operational parameters, such as duty cycle or frequency, or a piezo-electric, thermal bubble jet or ultrasonic atomizer. An electronic module may infer the temperature of the heating element from a measurement of the resistance of the element, possibly using data that has been empirically obtained for the specific heating element design. The vaporiser may also have a mode with lower vapour production. The vaporiser may comprise lights that are set to shine more brightly if the vaporiser is in power mode.