These batteries/tanks/ are an upgrade addition for your starter set up. These batteries run dual coil tanks and have the ability to manage the voltage from 3.3 volts to 4.8 volts. BUT if you are using single coil tanks/clearomizers  be aware the maximum voltage you should vape at is 4.1 volts to prevent premature burning of the single coil unit ..

The upgrade kits are a complete upgrade from your starter set up .