What kind of batteries do you have? If you aren't sure, post a picture. How old are the batteries, how have you been charging them? If it's via USB, well, maybe one of the first things I might do is remove the batteries and inspect them and the internal guts of the mod. If there is ANY moisture inside them, I would wipe the batteries down and also wipe down the battery contacts and whatever else is inside with rubbing alcohol, and then let it dry out THOROUGHLY. There is not a lot of risk by using rubbing alcohol to clean if the batteries are removed, since there won't be a power source. I'd probably only do that if you SEE moisture or grimy battery contacts.
How long have you had the batteries, the mod, and have you had any leaking or drops recently? I understand your situation as far as replacement may be difficult, but if you have had them a while and were vaping at a reasonably high wattage and/or they were fakes or rewraps, it MAY just be the batteries that are the problem.
It is EQUALLY possible, especially with the smok mod, that there may be something going on with the mod, though. Hard to say without something else to test them in, but I do wish you the bets of luck and I am also going to summon
@Baditude to this thread, he's kind of a battery guru around here and he may be able to offer you something more helpful.
Good luck, I hope you get it sorted out.
Anna
