I have a couple of 5.0v mods. My favorite is a Kalamazoo Triple-V. Great PV. I have had a 2.5 ohm dual coil atomizer on it for the last week or two. I have used dual coil cartos, triple coil cartos, single coil 3.0 and 3.2 ohm cartos, and 3.0 ohm atomizers on it.