ZMax is a new Smoktech product. Zmax is an intelligent battery mod for electronic cigarettes. You can adjust the voltage and you can also adjust the wattage. ZMax works with one 18650 (unprotected) battery. Also you can use an extra long cap which allows you to use two 18350 (unprotected) batteries like you propably know from earlier model VMax.
You can choose your favourite way of vaping, Watts or Voltage.