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also, whats the difference of voltages? i mean, is it for flavor, vapor production... total newbie here
Here's a simple explanation of voltage, ohms and watts, as they relate to vapor and flavor.
Watts = heat. Most people like to vape between 6 and 10 watts. Too much heat (watts) can make some flavors, like fruits and delicate flavors taste burnt. Too few watts and your vapor is weak and cold.
Volts = the voltage of your battery. For most e-cigs it averages 3.7V
Ohms = The resistance of your carto or atty. Expressed in ohms
Simple third grader formula.
Volts X Volts / Ohms = Watts
3.7V x 3.7V / 3ohms = 4.6 Watts. Too cool. Weak Vapor
3.7V x 3.7V / 1.5ohms = 9.1 Watts. Pretty warm. Good vape. Might be too warm for some flavors.
3.7V x 3.7V / 2ohms = 6.8 Watts. Getting closer. Good vape with lighter flavors.
3.7V x 3.7V / 1.7ohms = 8 Watts. You're golden for most
juice.
Choose your cartomizer resistance to produce the proper wattage for your taste and the juice you vape.
If you have a variable voltage PV, you can change the voltage instead of the ohms and that will change your watts.