Wax cartridges are a lot like oil cartridges except that they contain a few more ‘moving’ parts. In essence, the oil simply gets vaporized on a hot wick that soaks in the juices while a wax cartridge typically will deal with ceramic or quartz rods and dishes. This is where the wax will sit and then progressively get hotter until it is vaporized. This means that there is usually a longer of a charge time for a wax cartridge than an oil cartridge but the wax cartridge retains heat longer.