I dont see it happening. It might charge
batteries but replacing them is a whole different story. Your not going to be able to vape directly off that device at least not on that small. It will have to be big enough to put out 2 to 3 amp on demand to vape off of. Dont get me wrong i am a huge fan of fuel cells. I just think your going to need a much bigger cell then one the size of a pack of playing cards. When you get right down to it the fuel cell used butane which in itself can be explosive. I am sure that the company has done every thing they can to make it safe but your still dealing with something explosive. It is very rare but people have be very seriously injured by butane lighters i know of one guy that died while refilling his butane lighter. As far as ecigs go we have a ton of folks seeing dollar signs in there eyes making mods. I think it is safe to say that not all of them have safety in mind when building there devices. It is my firm belief that the very very few incidents that have resulted in a mod going terminal are design flaws or users buying cheep knock off
batteries. If done right li ion batteries can be extremely safe , if not you wouldn't see them in devices you put on your lap (laptop) or devices put up to your ear (cell phones).