In reading threads on here for the past few months, one common question is always revolving around which is better, single-coils or dual-coils, so I’ve decided to run a little experiment over the past two weeks to determine efficiency, e-juice use, and effect on the battery while using a Kanger ProTank 2 (BCC) and Kanger AeroTank (BDC). I won't bore anyone with the details (unless you want raw data or more info), but I will say I utilized as many control factors as possible (same Air Flow Co