RickMc, as a newbie, I'm still confused about something. Ad says: " This tank comes with 3 replaceable heating elements. One (1) each of 1.8, 2.4 and 2.8 ohms. So you can choose the one that produces the best experience for you. "
Okay, exactly "how" would one's "experience" be different with a 1.8, 2.4, or 2.8? I mean, what exactly do you experience when using those different things on lets say an Ego Twist?
I really have no idea what subtle differences would be inherent in any of those.
The amount of heat (wattage, just like a light bulb) your PV is producing influences the taste/throat hit/vapor production. The wattage can be calculated mathematically:
(volts) x (volts) / (ohms of resistance) = (watts)
So if you put those three "heating elements" (atomizer heads) on the same 3.7 volt device such as a KGO:
The 1.8 ohm head will produce 7.6 watts
The 2.4 ohm head will produce 5.7 watts (cooler vape with less flavor and TH)
The 2.8 ohm head will produce 4.9 watts (even less)
So you would probably use one of the lower resistance heads on an EGO or KGO, and the higher resistance head on a higher voltage or variable voltage device. At any given wattage, higher voltage/resistance combination drains the battery less.
Hope this helps some!