do you think it could be something as simple (and dangerous) as the batts divorcing? I really don't like devices where I can't remove batteries. Gives me the heebie-jeebies.
I don't know a lot about the istick but when I start reading about a high failure rate in a device, it perks my interest. And the istick seems to be having all sorts of random problems, everything from autofiring to not firing unless the button is mashed hard to random workings to actual fires. It can't all be from leaking juice, right? And then there are other folks happy as lambs with their sticks.
If you go over to the istick50 owner's thread, there's a tear-down or two you might find interesting.
Eleaf istick 50w Owners Group | Page 60 | E-Cigarette Forum