The chart is very helpful. After looking at it several times, I realized that rather than trying
to commit them all to memory, you can remember that you can safely go two above your
ohms. In other words, like you did for 2.4 ohms, you can vape two higher, which is 4.4
volts. That'll keep you in the pocket, and then you can vary slightly, only slightly higher
if you need to.
thats a decent rule of thumb.
a slightly more accurate method (and slightly more work) is to calculate wattage. you typically want to be 9 watts and lower. to calculate wattage, go to ohmslawcalculator.com, or just download the Ohm's Law app for your phone. you plug in your resistance/ohms and your voltage and wattage gets displayed.