What do you mean "ripped open"
Does Smokenv use hard to glued on endcaps to discourage refilling? (typical ripoff rebrander tactic)
With normal KR808D-1 cartos, the end cap is soft and comes out fairly easily. I stick a paperclip leg 2/3 to 3/4 of the way into the mouthhole, poke it against the inner wall of the mouth hole, and pop out the end cap without catching any stuffing or wires. I only use well constructed cartos designed for refilling like the KR808D-1 models Vapor4Life or SmokelessImage or Bloogplanet - no inner seals, and they have a defined center air channel. I can get 7 days use out of each if I keep it damp with suitable
juice and what I find to be suitable in thin clear
juice. I use PG w/ 20% or less VG and I avoid juices that drop flavoring sediment in the stuffing.
And your model could be KR808D-1 or the less compatible KR808D-2 (Greensmoke, Smoke 51 Duo, Red Dragon, and blank cartos - probably just one kind - at Vaporkings.com or AZSMokefree, D2 to D1 adapter at LeCig.com)
If SmokeNV is less than 9mm diameter and more like the diameter of a cig, then you are not really compatible w/ much of anything - it may be Chinese wholesaler model E8.
Note - You probably have automatic batteries with an open hole to the drag sensor? If you refill your cartos you need to make sure they are not going to leak before putting them back on your battery. AUto batteries are the easiest to damage or kill with
juice leaks.