Just a heads up because I found out the messy way ....
When you use a Kanger Evod BCC, which is a nice little tank, it is advisable to take the top collar ring off your eVic so you can clearly see that you are actually unscrewing the entire Evod off of the eVic to change or refill it. I went to change mine and didn't realize that while I thought I was unscrewing the entire Evod off the eVic, I was actually unscrewing the top of the Evod off of its bottom coil....
Yes, it is quite messy and I thought I would ruin the eVic. Fortunately, I jumped up and ran to the bathroom and avoided a vaping catastrophy! Removal of the collar ring will let you clearly see the bottom coil and then you can properly remove the Evod from the eVic. Just my two cents worth....
When you use a Kanger Evod BCC, which is a nice little tank, it is advisable to take the top collar ring off your eVic so you can clearly see that you are actually unscrewing the entire Evod off of the eVic to change or refill it. I went to change mine and didn't realize that while I thought I was unscrewing the entire Evod off the eVic, I was actually unscrewing the top of the Evod off of its bottom coil.... Yes, it is quite messy and I thought I would ruin the eVic. Fortunately, I jumped up and ran to the bathroom and avoided a vaping catastrophy! Removal of the collar ring will let you clearly see the bottom coil and then you can properly remove the Evod from the eVic. Just my two cents worth....
- all is right with the vaping world. Glad to see I'm not the only one! 
