well i have been vaping since 2008, and not had this problem until the laisimo L100, it wasn't that bad with any tank. the alien coated the batteries and i clean them often as well, taking the batteries out every 10 minutes is a bit too often, ok so tanks it happen with the kanger full sized sub ohm tank and a maganus ni tank, both are not know for leaking all that much, but that is all up for grabs as each has different experiences with the many tanks out there. i asked this about the two part 510 that seems to have found it's way in to many mods, it was safety at heart that i ask , not to turn into a finger pointing. there was no channel to get any small amount of juice that does leak to a point away from the batteries at all, so with all that said i find it funny the first thing is it's the fault of the user because no one else wants to ask the question is it safe? unlike a few years ago you read that a lot, and now as more people are getting into to it, they don't ask. i guess it is my fault to ask a question and hoped for a discussion on part being used, instead i get finger pointing and the blame game, sad very sad