Now with more power, the iStick 100W comes with the simplicity we've all come to know and love but also introduces a couple new features here and there. Batteries are now user replaceable using two 18650 high amp batteries, you will never have to wait and charge your unit. Just pop in a fresh married pair and you're all set. Now double the power of their famous iStick 50W, the iStick 100W will provide sufficient power for you sub ohm vapers out there. With a round and smooth surface, the iStick 100W will provide an ergonomic feel and a comfortable vaping experience. 18650 batteries and charger not included.