Since I was using a lot of electronic mods where you get all the data on the screen and I mostly used Power mode I could't really cope with the voltage settings on a PWM mod. I need to know how much power in Watts are actually used and also I wanted to know how many Amps are withdrawn from the batteries to avoid problematic/dangerous values.
So i fiddled a little spread sheet together with 2 different formulas.
The first one gives you the current in amps and the power in Watts after entering Voltage and resistance of the coil. This is just an info thing if you a curios how many watts the mod is actually using.
The 2nd one is to get an idea of which voltage to set on the PWM device. Enter the desired Watts and the resistance of the coil and it gives you the Voltage you have to set to get the Watts you want. Additional info is the current to see if it goes towards the 60Amps which are the limit for many 2x18650 mods.