Hi whiskey,
Just wanted to answer your question about batts. I bought two protected from madvapes. I can definitely attest to the fact they are not all the same. The first one had fit in snugly, the second a little more snugly, but the second one would not come out. I think it had something to do with the coating. This in no way was the fault of madvapes or the laser. It was my fault entirely. I really should have known better when the second one had a tighter fit. I just wanted you know that yes they can vary. I don't think it is the size of the battery, just the way the coating has been applied.
Yep, I have a couple of the protected 10440's from MV too and there is slight differences. At first one fit fairly snuggly and the other was so tight I was afraid to push it in. The protection circuit adds some length and girth to the battery as well as making it not quite symetrically round. The coating thickness maybe even varies slightly. From my understanding they basically take an unprotected batt, add a pcb piece to each end and connect them with a wire running down the side. Then it's all thinly coated.
With the Chameleon my protected batts are tight but b/c both ends are removable it's easy to get them out. Just take off the ends and push the batts right through. With the laser that's not possible and it makes getting a tight fitting batt out much harder. I did try a tiny strong magnet to see if that'd help but really, if I can't grab it with my fingers, I'm nervous that I'd get it in and never get it out! 8-o Thus why I'm currently using just 1 batt, charge it, use it, charge it, use it, repeat! I need to get more batts but was also hoping to get a few other items from Isaac once things are in stock! Til then, I just am forced to use my Chameleon during charging times (oh the HORROR!!!