neither of the PS mods are "variable voltage" in the electronic sense; entirely different approach. the specs i see for those new mods make them out to be slimmer, but not shorter, and if you've held either the icon or the V3 in your hand you wouldn't say diameter was of any concern. it's the heft of the stainless steel that makes the V3 in particular a sizable mod, but it's also these materials and the fact that they are all mechanical devices which make them longer term investments, that, if taken outside and accidentally dropped, are unlikely to break the unit or impede its functional ability. the V3 takes two 16340 sized batteries or a 17670, both cells with adequate drain rate capacities in their class. the 10440 and 14430 mods, in addition to being grossly inflated in their stated runtimes are only further strained by the amp draw that any of our atomizers put on them. not to knock your choice in future pv at all, it certainly sounds fun, but it really wouldn't be fair to compare them based upon size. the strengths of each are going to be the weakness of the other. those proposed mods should be compared to the little sister and big brother, if any. if you just want measurements however, the V3 with adapter attached is 4.125" tall and .5" across; it does 3.7V, 6V, and 7.4V with the capability of using the best batteries in its class without sacrificing any space in the process.