For some of you who are having trouble with too tight of a draw on your batteries, try cleaning out the little air holes under the threads.
Sometimes even a brand new battery will have clogged holes. Use a needle or pin (push pin works great) to clear those holes.
I know the lighter draw takes some getting used to but I get way more vapor with a lighter draw.
I am still using one of my original batteries bought in April with a lighter draw, and totally enjoy the lighter draw.....lots of vapor and good performance with the carts.
Not to say I don't enjoy the newer batteries, but they did take some getting used to in drawing harder.
Not sure if this is even possible, but from my experiences with varying "cloggedness" of cartos, perhaps it would be beneficial to create some sort of an adjustable valve for some variable airflow?
I usually bounce around from PT to XL to XL manual to shorty until I find the right mix for a particular carto that has hard draw issues.
This is a tedious issue to say the least. I started with the original and though they had too much airflow. The air made it take forever to inhale the vapor. It sounded like a plane was taking off in my face. V4L sent a battery with a tighter draw; I enjoyed it much more. As of now, the new batteries with the 10-13 second cutoff have a very nice draw. Almost perfect cigarette... the inconsistency issue lies with the carts...
Some carts have a strong atomizer. They almost exactly replicate a cigarette. These perfect carts are the exception, not the rule. Most carts have a nice draw, and sometimes, I have to put a cart on a few different batteries to see which one it "likes" the best. Therefore, I have a feeling that the atomizers might play a role in the process. Perhaps the atomizer design/power should be analyzed as well to determine the best combination of both. If this has already been done, please forgive...
The draw on my PT is perfect. I'd like it to be a little lighter on my regular auto's.