i feel your pain,,,charlie310,,,and yes its possible to tank a volt 808 batt,,,,those 3.5ml dcts you mention are 1.5 ohm,, they will not work with volts regulated batteries,,,ive tried 1.5 cartos,,1.7ohm cartos,,,the regulator in the (all) volt batteries will not let it power,,,reads it as a short circuit,,,volts clearos are ok for thinner juice,,,not good for anything over 50/50,,espically dark juices dont run well in the volt clearomisers,,,,those run at 2.6-2.9 ohm,,,,so my next step is to try a 2.5 ohm carto,,with a tank like smoketech,,,,always order the xl,,(extra long) cartos,,,or they will not fit most tanks,,,theyll be too short,,,diameter should be ok,,get the stainless cartos,,,no black paper,,,,
ive punched 3 holes (3 for my 50/50+ juice mix,,1or2 for higher pg) in the xl volt carto,,and run in a smoketech tank,,im getting much better vape,,because the carto is always saturated,,,but like you,,im looking for better,,,hard to do with a limited voltage/current battery like volt,,,,
if you dont like the taste of cartos,,,volts clearos are good,,but dont work for me because i run heavy juice(over 50%vg),,
and dont try dual-coil cartos,,,regardless of ohms,,,,current protection will shut em down,,,
good choice for you is to try the vivi tank from gotvapes,,(you will need the 510/808 adapter,available everywhere,,like 5 bucks,,good to have with the volt,,seeing all the good stuff out there is 510 threads anyway),,comes with 3 different ohms,,(2.4/2.6/2.8),,all should work with volt batteries,,wouldnt try anything lower than that,,i like the screw caps with it,,,most tanks are just push in,,,and the vivis work the same as volts clearos,,no carto filler,,just a wick,,for better flavor,,,get the lowest ohm on that volt batt,(the 2.4 should rock),and you should be cranking!!(i intend to try it myself for my thinner juices)
i encourage research on my untested opinions before buying,,weve all gone broke going that route,,,but its not hard here on the forum,,great people here,,,
as i said,,im the same boat as you,,wanting more out of my volt x2 1300mah battery,,,tank for no refills every couple hrs,,and lower-ohm clearo/wick type for clean taste,,,will work on lower mah batteries,,just use one/charge one,,,should get ya happy again about vaping,,,,
do not get discouraged,,as i sense in your post,,,anyone here will tell you its frustrating getting to that sweet spot,,but this forum has the answers!....ill keep yaall updated!,,,,