Not true at all...the coil doesn't affect how many amps are being pulled but the board still needs batteries with the right amp limit when using them at higher power
Actually, the IC controller works in 2 stages. Battery IN and power out. On the in side, the amperage is taken into account, sent through the control chip, passed out to the atomizer leads (+/- on the 510 connector). The output follows this formula to determine wattage. voltage squared divided by resistance. Voltage is usually boosted to a set value, depending on the mod to give a steady vape from full charge to min charge. So as far as vaping a regulated mod goes, battery amperage has no effect on power out. Now taking Ohms Law into account, a 200w mod with 2 batteries, at 8.4V pulls 23 amps at 0.35 ohms.
Input Side
The Input Side is where the controller pulls power from the battery.
Ohm’s law states:
Power = Voltage * Current
- Power is the wattage that the controller wants to pull from the battery.
- Voltage is provided by the battery and cannot be controlled (besides charging the battery). A Lithium Ion battery will usually provide between 2.5 and 4.2V, with a nominal cell voltage of approximately 3.7V (average voltage output). The controllers minimum input voltage will determine the lowest voltage it will accept before considering the battery too weak or empty.
Current is the amperage that will be drawn from the battery to obtain the power required. To calculate the current draw, we simply move Voltage from Ohm’s Law from the right of the equation to the left.
*from
http://blog.thevaporist.org/2015/12/29/regulated-mods/
As stated, Input Side provides the voltage, which is then VxV / resistance.
You can test this out for yourself.
Take a fully charged battery/s on say a 200w mod.
Build a coil with a resistance of say 0.5 ohm
Crank the power up to Max.. Notice, it will not hit the 200W your box states it will do.
Add a 2nd 0.5 ohm coil to the build, now the total resistance is halved.. crank the box to max..
Now you get the full 200W
I could be a little off here, but I think I read most mods limit voltage to 7.7v (2 batteries) coming off the input, sooo
7.7v sqr = 59.29v / 0.5 ohm = 118.58W output. (on a 200w mod)
7.7v sqr = 59.29v / 0.25 ohm = 237.16W output limited to max 200w (on a 200w mod)
Test it out.. your mod might be a little different, but the results will be about the same.
So yes, it needs 20A or better, since the HG2 are a 20A 3000mah battery.... they work better than a 30A /1500mah battery, simply because they last longer per charge and therefore, need fewer charges in the same given time period. We already know that the battery chemistry breaks down as it cycles from full power to low limit and recharged. (but that is another topic)