Before I present my question I would just like to start by saying ECF is amazing!!!! And has been a crucial part of helping me to become a full time vapor and off analogs for 6 months now and the knowledge in here is endless. Anyway I am hoping someone in here can tell me a good cig a like battery that is 510 threaded and puts out 4.2v ? I'm asking because I'm one of those people that has a hang up on the cig a like size I've been happily using v2 ex blanks with v2 batteries and I love them but someone recommended kanger esmart to me so I'm giving them a try but the problem is they are 510 thread and I find myself liking the v2 ex more still but I think that's only because my v2 batteries put out 4.2v and all my 510 ones are 3.4 or 3.7.... Now I have a bunch of these esmart a I don't want to go to waste....also before anyone says it I do have evod twist and aspire tanks for bigger vaping and I'm aware I could use the twist but I specifically want cig a like size for out and about....any help would be appreciated