An aerosol provision system 1 comprises a battery 16 for providing power to an aerosol generator 40 and a sensor for generating sensor data over a predetermined period of time. Control circuitry 18 is configured to process the sensor data and charge level data relating to the charge level in the battery 16 to determine whether a notification should be generated. In response to determining that the notification should be generated, the control circuitry 18 generates a notification signal for output from an output device 200, which may be a suggestion to recharge the battery 16 in a predetermined different way to improve the performance of the battery 16 in the longer term. The sensor may comprise a temperature sensor, and the notification may suggest to recharge the battery in a warmer or a cooler location. Alternatively, the suggestion may be not to recharge the battery for so long or not to interrupt charging until the battery is fully charged.