Look at ohm's law
Here is a more in depth look at ohms law
Ohm's Law -
https://learn.sparkfun.com/tutorials/voltage-current-resistance-and-ohms-law
When choosing a battery for your mod it is important to make sure that the battery can handle the current that you are pulling from the battery. Also ensure you know the limitations of your mod per the manufacturer.
Using ohms law you can easily determine the current draw. Please see the threads authored by baditude, here in the battery section; or, myself in the beginner area.
ohms law-V = I x R Or I = V/R when I=current(amps), V=voltage, R=resistance(ohms)
So, if I need the current for a battery- I am assuming the battery at mean voltage therefore it is at 3.7v. and I am firing a 0.5 ohm resistance. Those are my two constants for the same of our math.
I would use the following as my equation:
I = 3.7v/0.5ohms
in this case I am only pulling 7.4A and 27.4 w; therefore, I want s battery that is capable of providing 7.4A safely.
admittingly, as the chart shows, most batteries can handle this. problems ome into play when people fire to far low.
NOW, lets try this with a 0.2 ohm load (coil), the voltage is the same here.
I=3.7v/0.5ohms
in this case we have 18.5amps and 68.45 w. Therefore, it is easily illustrated that the field of suitable batteries, has greatly been reduced to cells that can handle a continuous current of 20A.
But- To directly answer your question, I would not advise anyone to go below a 0.2ohm build with those batteries.
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