Thanks, Ya I was just curious if anyone knew, but I will ask Joyetech.
I like mine. It performs well and is a small little unit, although I got the 2200 mah. I found the way I hold them in my hand and where the button is positioned that the 1100 was just too small.
Only thing I don't like about it is, the coil sticks to the inside rim of the carto so every time I twist the carto off to refill juice I have to pickup the juice covered coil and twist it back in. Pretty minor for how well it performs combined with the size of it though.
I do really like the differences in the 2 coils (0.5 ohm and 1.0 ohm) the 1.0 ohm coil has a smaller airflow tube coming out of it so it's a harder pull which really mimicks the pull of a cig quite well, and when I really want to open it up for some good clouds, pop in the 0.5 with quite a bit more airflow.
Overall I still really enjoy it.