Could someone please explain "low resistance atomizers"?
Resistance in an electrical circuit is measure in Ohms. The lower the ohms the hotter the resistance. The hotter the resistance in an atomizer, the more vapor is produced. Normal ohms for the 510 atomizer is around 2.1-2.3 ohms. So within the 510 family, an low resistance atomizer - LR atty - is anywhere from 1.5-2.0 ohms. Same with the LR cartomizers that are being sold for the 510.
The problem can be, that because of the increased heat, one can burn out LR attys more easily - so to combat that, you need to keep LR atomizers wet and refill or redrip whenever you detect a loss in flavor and not allow it to get to where you get a 'burnt' taste, because then you're seconds away from burning out the atomizer if you haven't already.