So I had made the decision to buy an ipv 2S because it was the smack dab in the middle Box Mod as far as Wattage was concerned. But then I couldn't find anything about it having a vent for the batteries since they made it waterproof, and the ipv 2 had battery vents. Does anyone know if the safety features on the IPV 2S are good enough that I don't need to worry about it? Does the IPV 3 have vents (didn't want to go that high since it's a bit overkill for me)? I'm trying to get the safest device possible but not go with outdated tech. Thanks!