Inspired by Cisco, Warp1900 and many other great modders here I've experimented with a few different modds using different voltage regulators (317 adjustable, 383-5v and 383-adjustable) and batteries (18650 protected and un-protected, CR2).
317 was a disappointment for me. I like vaping
. I don't use high nic juice but I make clouds almost all the time. The 317 VR has a high Vdrop and therefore does not last long on 2xCR2. The 383 - 5v VR has an acceptable performance and last few good hours for me but I like the most 383-adjustable VR so far with 2xCR2. I tried it with all the different volts within 3.6v to 6v range for a while and finally settled on 4.5v as my sweet spot. The 3.7v to 4.2v performed just like normal battery but 18650 will last more than a day easily, 2xCR2 with VR set to this range does not last nearly as long as 18650 so there is no point in using them in this mod. The 5v to 6v produces tons of clouds (more volts = more clouds) at the cost of taste, acceptable performance only a quick and well spaced in time draws and shorter life of your atty (theoretically, I kept my atty always wet and did not burned any). The 4.5v produced slightly less clouds but not by much with full taste still there and not sensitive if I took a long draw or short.. But you can set voltage to anything you like.
317 was a disappointment for me. I like vaping
. I don't use high nic juice but I make clouds almost all the time. The 317 VR has a high Vdrop and therefore does not last long on 2xCR2. The 383 - 5v VR has an acceptable performance and last few good hours for me but I like the most 383-adjustable VR so far with 2xCR2. I tried it with all the different volts within 3.6v to 6v range for a while and finally settled on 4.5v as my sweet spot. The 3.7v to 4.2v performed just like normal battery but 18650 will last more than a day easily, 2xCR2 with VR set to this range does not last nearly as long as 18650 so there is no point in using them in this mod. The 5v to 6v produces tons of clouds (more volts = more clouds) at the cost of taste, acceptable performance only a quick and well spaced in time draws and shorter life of your atty (theoretically, I kept my atty always wet and did not burned any). The 4.5v produced slightly less clouds but not by much with full taste still there and not sensitive if I took a long draw or short.. But you can set voltage to anything you like. 
