Am I the only one using stacked 18350s? After owning the SVD for 2 months I find the performance much superior with stacked batts compared to single batt. In terms of power, consistency, efficiency, it beats the single batt hands down. Batt life lasts me a whole day of 13-15w vaping. Only thing is it's very slightly longer than 18650 mode, I can even use back the short tube.
It's not dangerous as in stacking in a mech coz the amp draw is less(in fact, less than single batt mode) and the possibility of reverse charging(the dangerous part of stacking) is technically non existing coz the SVD won't fire when voltage too low.
One thing though, batts must be used and kept in pairs. I have 4 sets of AW 18350s(8 of em) that i use in rotation and charged using a hobby charger, monitoring the mAh being charged for each of them.
At first, it seems like more hassle having to deal with 2 batts at a time and being my longest mod, not so pocket friendly.
But the returns in performance and consistency far outweighs that. Plus in voltage mode, I can crank it to 6v to get a bit more than 15w(2.2ohm)