So i have a 3.7v battery (brand fifty one) and a couple 4.2v batteries (brand v2cigs) the 3.7v gives me more vapor and i think its the atomizers i am using. on my 3.7v im using a smoketech 510 2.0ohm atty and on the 4.2v im using a dse-901 3.0ohm atty. why do i get more vapor from the 3.7volt? should i have gotten a lower ohm for the 4.2v???