I bought a 510 when I first started with the vaporing...or vaporizing. I do like the 510 but I wanted to try something different, with a little less maintenance. So I got a KR808D-1. It's okay so far. The battery cutoff is still to short for me even though it is longer than most auto's. I like the idea of the auto batteries, being more like smoking, but this cutoff is killing me. It's just not good enough. Is there any kind of break-in period for these? Will it burn longer after some use. I really want to like it. Any advice or suggestions are appreciated.