Didnt know about that, where do i find that at?
Give me a few minutes, and I'll edit some info about mods into this post.
EDIT:
OK, the battery of your eCig is nothing more than a simple Lithium Ion battery with a momentary on/off switch. They make all different sizes of
batteries, and many of them will power an atomizer very well, and for extended lengths of time (up to 3 days!). The trouble is that most people want very small, cigarette-looking batteries (at first). If you want a battery to last longer and perform better, than you need a larger battery!
Here's what is called a "box mod" that you can build yourself for a few bucks worth of radio shack parts:
How To: Build a NicoStick
Here's a thread where you can
sign up for online mod classes (it's free, of course).
Here are some links to high-quality commercial mods for sale:
AltSmoke (Silver Bullet, BB) The Silver Bullet (SB) is legendary around here. Top-notch company, built like a tank, uses an 18650 battery that will last a light vaper 2 or 3 days.
Vapor Kings The GG line, my favorite mod. Expensive, and worth it.
Thagbuilt The legendary Chuck, (and Little Chuck), one of the most popular mods around. Custom graphics (whatever you send him).
That should get you started on your big-battery mod research. There are tons of others, and many of them are very good with lots of fans.