People may have noticed I like messing with my batteries. Thought I'd share what I've done to make them perfect IMO. I love the shorty autos but they all seem to have too light a draw for my taste. My manual seemed to heat the atomizer a bit better, better vapor, but also too "airy". So in the end I took some some silicone gasket maker(good to 400 degrees) and filled one hole in the auto. Better, but what happens if I fill 2? After further review, 2 filled holes is exactly what I was looking for. The draw is almost identical to a well packed analog. The vapor is warmer(I'm assuming the restricted airflow keeps things from cooling as much). Vapor production is equal to my manual. Basically, it's perfect for me. I keep my manual as a back up, but my remaining autos(the ones that lived thru my extended alcohol bath and drill bit work) are amazing to me. Maybe the extra heat will kill a cart quicker. Big deal. I have plenty and they don't cost that much. A perfect draw, perfect size, and feel are worth the trade off to me. But now does this mean maybe a 5v is in my future to get the higher heat? We'll see. (Toothpicks are a simpler solution for the holes I understand. I just didn't have any. LOL)