For you people with the low ohm coils ... How do you even power it safely?

[Flt Simulation]

Seems like every time I read this forum, people keep going to lower and lower ohm coils.

Example ... Lets say you build a 0.6 ohm coil. If you attempt to power it with even 3.7 volts, it will take 22.8 watts of power (ohm's law) .. That a lot of power!

Do you find that the standard 18650 battery likes to feed something requiring as much as 22.8 watts of power?

And even if your using a Kick 2 for power regulation in your mod, the Kick 2 is only capable of supplying a max of 15 watts of power, so that certainly won't work in this scenario.

So, please tell someone uneducated about this, like myself, how do most of you folks safely power these low low ohm coils? .... Car batteries?

Thanks,
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BTW .... My normal build on my Kayfun is using 28 AWG wire with 10 wraps around a 2.4mm (3/32") drill shaft ... That gets me a 1.6 ohm coil.

I then power this single 1.6 ohm coil with 3.8 volts which is 9.0 watts (the coil is then drawing 2.4 amps) ..... This is well under the max power out put of 10 watts on my Kick 1 module.

... and it works very well


I just can't imagine what specialized type of battery that you would need to continually vape on a coil that needs 20+ watts of power.

 

[SleeZy]

Most people tend to use batteries with 30A for subohming "safetly"

 

[Flt Simulation]

I bet they don't last very long between charges

And I guess they don't use a power regulator such as a Kick 1 or Kick 2 since the Kick 1 is only good up to 10 watts, and the Kick 2 up to 15 watts.


I can't believe they are just using a straight 18650 / 30 amp battery in an unregulated mechanical "tube mod" with nothing to adjust the voltage or watts ... and just hope for the best?

If I was a betting man, I would bet they must be using some kind of high-powered VW regulated "Box Mod" ? ?

 

[beckdg]

the voltage drop off (and thus performance decrease) is very noticeable when a lithium battery reaches near it's low voltage range while it's stressed even moderately.

if you're putting high power through a lithium battery with no regulation, it's very, very obvious when it's time to recharge. often, the vape suffers greatly to the point it's not enjoyable quite a bit before the battery requires charging.

30 amps @ 4.2V = 126W @ 0.14Ω

while it's not anything i'd recommend to calculate a batterys limit and build to it, there's a lot less likelyhood of serious issue than people make it out to be. otherwise there'd be blown up batteries in peoples faces on the news as a daily routine.

i typically keep my builds above 1Ω @ battery voltage and the drop off is so obvious on a 24 amp AW battery that i'm always at 3.8 or 3.9 volts when the vape is unsatisfying and it's time for a recharge.

 

[pmcode]

22.8 watts is only barely over 6 amps, at your specified 3.7 volts. That is only, what, 20% of the power available to a decent 30A battery? Even at a full charge of 4.2 volts, it is only 7 amps.

Even a low end, 10A battery you are only running at just over 50% of the batteries nominal amperage, to say nothing of what the battery may be able to do under it's "pulse amperage rating" (not that I have ever used those specs to test anything).

I get a full days usage on one charge on my "unregulated mechanical "tube mod" with nothing to adjust the voltage or watts".

/begin snarky reply
And I would guess that you obviously don't understand Ohm's Law, even though you were able to find an online calcu-la-tater to do it for you.

Oh, since this is obviously all about, IMHO, or whatever, I should add, that posts that start out like yours, IMHO should be deleted immediately, as all you are doing is "stirring the pot", labeled as "somebody please educate me". You don't want education, you want to start a p|ssing contest.
/end

 

[jersey_emt]

With a 0.6 ohm coil, even at the battery's full voltage (4.2 volts), that is only 7 amps. Many of the batteries we use are rated for 20 - 30 amps, so this is well within the limits of what the battery is capable of delivering.

 

[Flt Simulation]

Thanks for all the info. I guess I was not realizing that 7 or so amps is really not that much of a draw on a battery.

I was thinking in more in watts ... Even the Kick 2 is only good for 15 watts, so using that would be out of the question with these sub-ohm coils.
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pmcode .... You, my friend are reading way too much into my post when you stated that I was just "stirring the pot" and that I just "want to start a pissing contest" ... You are you to tell me what my intentions are in my post!

However, you are right in stating that ... Your reply was going to be "snarky", as you put it.

And your also right in stating that I "obviously don't understand ohm's law" well enough ... Again, I just thought that 20+ watts was an awful lot of power to a single little coil.

 

[pmcode]

Yeah, I agree I came off harsh....

Just seen a lot of people lately saying they "only want info" or whatever, and then further on in the thread make blanket statements. Guess I just need a nap, or something. Absolutely, positively meant nothing personal. Have a on me.

 

[Steamer861]

The Kick2 can go down as low as .5 I have a .5 build with a 30 amp sony and a Kick2 it works good and the battery lasts well not that long

 

[HauntedMyst]

I use a Heisenberg compensator.

 

[Flt Simulation]

The Kick2 can go down as low as .5 I have a .5 build with a 30 amp sony and a Kick2 it works good and the battery lasts well not that long

I use a Kick 1, and it will only put out a max of 10 watts of power. I don't have a Kick 2, but I understand that the Kick 2 will only put out a max of 15 watts of power.
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The reason I mentioned the Kick is because if you had a 0.6 ohm coil, and fed it just 3.7 volts, it would require 22.8 watts of power (way above the 15 watt limit for the Kick 2)

Looking at the calculator, again, if you had a 0.6 ohm coil, the max volts you could feed it would only be 3.0 (anything above 3.0v would be greater than the 15 watt limit for the Kick 2)

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I am kinda new to all this ... I am just trying to understand how the many people here are able to power sub-ohm coils with high power.