Well, that'll be interesting! The main reason I don't want to build one from a flashlight case is the size. I've got 2 3.7v 2500Mah 18650
batteries being shipped now, I see that they are bigger than AA so that rules out most conventional electronic
devices to be used as a tube. One of the main concerns about my newest idea is that the battery wouldn't be easily replacable so...I can either make one too big or make a small one that needs to be torn apart and rebuilt when the battery needs to be replaced. Until I build a new one I'm trying to find the smartest way to do it to maintain small size and still be able to pop out the battery easily if needed. I think the 18650 battery as a power source is a good start. I'm really glad other people on the forum are also pitching in their ideas - I think it just makes this "hobby" better sharing these ideas. Someone could take my USB
mod and say wow I like it but maybe this will be better... then it eventually turns into something really good. Lets keep it up. The better and easier to use my ecig is, the less likely I am to smoke cancer sticks. That's one of the main reasons I got into tinkering and trying to make the ecig more reliable and easier to deal with. Looking forward to seeing what you're working on madog.