i was on ebay looking for batteries when i came across this listing that had a charger and 2 18350s and two "epipe tanks" they seem to be different to normal tanks in that they have a little protruding contact. i assume i can use them on my mods, as i dont have an epipe, but what are they, and should i buy the epipe that they go to?
either way, $10.50 was a steal

either way, $10.50 was a steal
