So finally got an atty to try my hands at building coils and what not. Got the IGO-W4 with the air holes drilled out larger (they were way to small beforehand but forget exactly how large these are). Built my first dual coil at .9 ohms and it was firing great, 4 wraps each with 30g Kanthol wire. Now, as someone that can't be happy with something that already works, I've just been rebuilding and playing with it. I've tried .8-1.8ohm builds. But then it hit me, i should probably learn the limits of my battery before my face meets the hot end of a catastrophic failure. So that's why I'm here, can someone explain ohm's law for a total noob like me? I want to find the perfect setup but at the same time don't wanna burn my house down. For reference, I'm using a 3.7v 2000mAh 18650 battery in K100 (stock k100 battery till my local shop gets more Sony batteries). Any advice is more than welcome.
Starting to rebuild but don't want to blow up..
- Thread starter wtbcody
- Start date
- th_trl_thread_readers 0
- Status
i myself am not a "veteran" in the vape world but from what i have found out through research and lurking in these forums is that you need to know the limits of your battery. personally i dont know what battery comes with the K100 but nonetheless, make sure you know your battery's amp limit. im guessing that it is about 10A
with the information that you have posted and using this ohms law calculator online Ohm's Law Calculator
you type in the voltage of your battery 3.7 or 4.2 at full charge (usually), then the resistance of your coils 0.9ohms.
it calculates to about 4.7A.
as long as your builds do not exceed your battery's limits you are safe.
i personally have been using my rebuildable nimbus atty for about a week now and i have a basic grasp of ohms, amps and battery limits.
i hope this helps a fellow newcomer into rebuildables
with the information that you have posted and using this ohms law calculator online Ohm's Law Calculator
you type in the voltage of your battery 3.7 or 4.2 at full charge (usually), then the resistance of your coils 0.9ohms.
it calculates to about 4.7A.
as long as your builds do not exceed your battery's limits you are safe.
i personally have been using my rebuildable nimbus atty for about a week now and i have a basic grasp of ohms, amps and battery limits.
i hope this helps a fellow newcomer into rebuildables
Likely this. Good thing you've stuck with .8Ω and above.
Here's something you'll probably want. 20 amperes. Plenty of power and then some, because coils can suddenly change ohm so you want to give yourself a .2Ω margin of safety nettage.
Or check out micro coils, which, though I cannot compare to sub-ohm vaping as I'm not into it... are quite fantastic and entirely more safe. Dripping a mixture of a NET and Candy Cane on my 1.3Ω Mini coil right now. Sublime.
you didnt specify what brand battery you have, I dont know what comes with a stock k100 battery, never knew k100 came with batteries lol. or unless you mean the place you purchased gave them to you with the k100. I would guess their efests?
You need to look up the specific amp rating for your battery and do not exceed the amp draw that your batteries can provide.
staying above .8 to me is generally pretty safe as long as you have a good battery. Its when you go below .6 or .5 that i would really really be careful.
You need to look up the specific amp rating for your battery and do not exceed the amp draw that your batteries can provide.
staying above .8 to me is generally pretty safe as long as you have a good battery. Its when you go below .6 or .5 that i would really really be careful.
I had assumed that the batteries were included with all kits because there was a 18350 and 18650 included. I'll check what brand they are when I get home, have both charging right now. Guess my shop believes in freebies haha.
Update: Kamry included an efest 18350 and 18650 battery. The one in question (18650) has a 4-7 amp rating. So now the question is, is it safe to use a coil between .9-1.3 ohms with this? Ohm's law calculator is still a tad confusing to me
Type in the ohm in the "resistance" window. Type in the voltage you will be using (4.2v with a mech). Hit calculate. The amp draw of the coil will be displayed as "current" in amps. Just check to see if the "current" isn't more than your battery's limit.
i use AW IMR 18650 with a 10A limit, i suggest switching to these if you aren't sure about your current batteries.
i use AW IMR 18650 with a 10A limit, i suggest switching to these if you aren't sure about your current batteries.
not trying to be insulting so but i have to ask
4 wraps of 30 in a dual coil reading .9 ohms? is this each coil or the whole build. just wondering cause that seems a little high, but without seeing the build i could be off.
4 wraps of 30 in a dual coil reading .9 ohms? is this each coil or the whole build. just wondering cause that seems a little high, but without seeing the build i could be off.
The entire build, that's what my ohm meter read. I'm gonna rebuild it tonight and double check
ok are you testing the leads of the mm by themselves and subtracting that from the reading? just checking as usually the leads add a few points and people forget that.
Didn't consider that... Actually didn't even think of that... Thanks haha
Information Resources for Your First RBA
How to Use Your Multimeter
Video on How to Use Your Multmeter
Efest IMR 18650 2000mAh 10Amp
Efest IMR 18350 800mah 6.4Amp
Ohm's Law Calculator
How to Use Your Multimeter
Video on How to Use Your Multmeter
Efest IMR 18650 2000mAh 10Amp
Efest IMR 18350 800mah 6.4Amp
Ohm's Law Calculator
V / R = I (Voltage Divided by Resistance = Current)
A fresh battery has 4.2 volts, and you want to know if a 0.9 ohm coil is safe so...
4.2 / 0.9 = 4.666 amps
So that should be ok...
If if it is that IMR model baditude mentioned.
However... this is not the best performing battery for sub-ohms (which i don't recommend btw).
I'd get something like the Sony Konions with a 30 amp limit.
A fresh battery has 4.2 volts, and you want to know if a 0.9 ohm coil is safe so...
4.2 / 0.9 = 4.666 amps
So that should be ok...
If if it is that IMR model baditude mentioned.
However... this is not the best performing battery for sub-ohms (which i don't recommend btw).
I'd get something like the Sony Konions with a 30 amp limit.
Thanks a lot for the answers, I understand it pretty well now. And I'll be replacing this battery as soon as possible. (Not for sub-ohms but just because it isn't a relatively good battery)
- Status
Similar threads
- Locked
