Smoke free now for over a month..
I did build a nico stick for under 15.00 included bats and charger from madvapes.com (they even have a ""how to" link for you) 3.7 V 900 mAh recommended 2AAA box mod but did the 1 cause I like a challenge lol
I have one manual and one automatic stock joyes
I also have 3 L2 bats (that I never use-in as backups only)
I have 1SEJ Mega 510 use a lot.
I have an adapter for my 510 that let's me use cartos.
I just got 4 bloogs and been told my batterys are probably all bad.
(they work but not right-nother story)
Only problems with batteries so far- has been the ones I just got.
Now as to mods with the battery last-most mods use the same basic type of batteries (you can see many of them listed on Mad vapes site or look into the modders forum).
Some mods do not even supply the batteries. But they are something you can buy and not through them.
Ugo is a bit different and new and is getting great reviews. Janty's battery
Juicebox same same situation as the previous mods buy your own battery-but unlike most mods it also address the e-juice and not having to refill it very often maybe 2 a week? Or to change flavors.
Also check out GLV he has a giveaway going on a fine model..sounds like you might win it....
http://www.e-cigarette-forum.com/forum/greatlakesvapor/59315-glv-free-contest.html....you deserve a break LOL but you will need to buy your own battery (but doesn't have to be from any pv shop or u can LOL) Just saw one go up in classifieds!