My build is a dual 316l dual clapton, ss core and outter, measuring .016 ohms, my mod is a sdna75 and i am looking to get either a 133, 200, or dual 18650 powered 75 mod. I appreciate all feedback so far and the voltage cut off/limit chart is going to be useful, thanx. But my current mod being that its a dna 75 board doesnt apply to dual, tripple, or lipo pack 200 board limits since its only a single 18650. From searching i havent found a definitive answer for my mod on what the lowest resitance build it can fire in powermode. I believe the .08 ohm min. applies to both the 75 & 200 boards? Just read some specs that my mod had a min. Power mode resistance min. of something a long the lines of .2 ohms when i cant see that being true as i switch between power and temp with the build (.16 ss x2 claptons) regularly and it fires in both modes. Sorry for the confusion as my original post was sort of two parted asking why i some times get roughly 40w after my battery starts getting lower in charge and to me seems like it is "sag", then i ask about whether a dna 200 lipo, dna 133 dual, or now i'm tossing the idea of a dual 75 around in my head for my next purchase for my heavy hitter, around the house mod. Does any one have any feedback on the boxer 75 dual, the cheaper one thats under $100?