I'm not good with numbers so I will let someone else talk about what a T-3 is.
It really is just a little bit longer than the CE3 thingey. I like mine to look like a cig, too, but I decided that people are not really going to notice and so far they haven't given me a second look when I am walking into the grocery store or driving around.
The neighbor asked me about the 650 I had with a CE3 on it "What is that, one of the Electronic Cigarettes?" but we were hanging out and talking so she was right there and it was the bigger battery. With the 78 I don't think anyone looks twice.
Yea I guess your right maybe its just in my head haha. Whats the optimal point to fill these about 80%?
I did notice they smoke better with my 80/20 PG/VG mix then my 100% VG which is pretty thin for being VG.