An electronic cigarette vaporizer system including a cartridge designed to provide a liquid or other substance for the electronic vaporizer system, the cartridge including a chip that stores data related to the batch number of the substance stored in the cartridge, and the cartridge being adapted to be inserted into or form an integral part of the electronic vaporizer system. The electronic vaporizer system reads the data from the chip and compares that data with stored data and, depending on the result of that comparison, either prevents or permits use of that substance.