New to Sub ohm, rda, and mechs

[Don Robertson]

I'll give you credit for asking and for research; that's far more than some do. Perhaps in the future since there is NO doubt you are going to buy and buy and buy ..... be certain the battery will be safe using the excellent parameters "Mikey" (I believe) suggested (80% of max amps). Using a battery and then asking? If it was a REALLY bad battery choice - think of what "could have" happened - even if it did not. You are worth far more than a 'good cloud of vapor'.

Senile Old Man Don ......... Out of the 'Preachin' Mode' and back inside my crate.

 

[Revelene]

Mechanical mods are great but the Vision Blade will be severely lacking in performance.

 

[DrillRX]

My vamo v3 will do all of that for me except for test firing anything below 1.2ohms. but as long as it doesn't give a warning for short I throw it on the mech and test fire it.

I'm still curious as to whether or not I should use those batts in my mech, and if so what would be the min recommendation

I would recommend ordering Sony US18650VTC4 batteries and get a good nitecore battery charger for them. They have a 30 amp limit and are 2100 mah batteries. JetBatteries.com usually has a deal for 4 batteries and a Nitecore i4 charger for around $47 plus shipping.

Those should cover all the bases you're likely to come across.

 

[FnMagic]

I would recommend ordering Sony US18650VTC4 batteries and get a good nitecore battery charger for them. They have a 30 amp limit and are 2100 mah batteries. JetBatteries.com usually has a deal for 4 batteries and a Nitecore i4 charger for around $47 plus shipping.

Those should cover all the bases you're likely to come across.

This is something I have been wondering about. I bought one of these batteries for my first Mech (Trident on a maraxus, ithika on the way) from a local vape shop and the guy at the counter also told me these were rated for a 30A discharge. Everywhere I look seems to say the same, except on one table that lists it having a max discharge of 25A, with a continuous discharge of 10A, and a minimum safe resistance of 0.5 ohms... I had just built my second dual coil and it was right at .3 ohms, which was pulling 14.3A. The coil rocked and I was really excited about it but after reading for days on battery safety and the fact that I couldnt use my 7A safety fuse, when I came across this possibly incorrect chart I freaked out a little bit and rebuilt the coil to .8 ohms... 28 awg kanthal is not good for this, as I needed 15 wraps per coil and its taking a whole 2-3 seconds to get to a good temp now. Plus, the long coils restrict juice flow. I just wanted some clarification.

I multiplied the printed C value on the battery (4) by the 2.1Ah, as described on some threads, but I still dont get 30. Not sure how valid that calculation is, but back to my main question: are Sony 18650VTC4 2100mAh batteries really rated to 30A? I think with my wire gauge this battery should be able to handle .4ohm coils without a problem, since by I=V/R, my minimum safe ohms should theoretically be .12333 ohms. While I was running the .3 ohm setup the battery never even got warm. I would rather not vent my first cell due to marketing hype or misinformation. I just want to clear this up.

Thanks.

 

[DrillRX]

This is something I have been wondering about. I bought one of these batteries for my first Mech (Trident on a maraxus, ithika on the way) from a local vape shop and the guy at the counter also told me these were rated for a 30A discharge. Everywhere I look seems to say the same, except on one table that lists it having a max discharge of 25A, with a continuous discharge of 10A, and a minimum safe resistance of 0.5 ohms... I had just built my second dual coil and it was right at .3 ohms, which was pulling 14.3A. The coil rocked and I was really excited about it but after reading for days on battery safety and the fact that I couldnt use my 7A safety fuse, when I came across this possibly incorrect chart I freaked out a little bit and rebuilt the coil to .8 ohms... 28 awg kanthal is not good for this, as I needed 15 wraps per coil and its taking a whole 2-3 seconds to get to a good temp now. Plus, the long coils restrict juice flow. I just wanted some clarification.

I multiplied the printed C value on the battery (4) by the 2.1Ah, as described on some threads, but I still dont get 30. Not sure how valid that calculation is, but back to my main question: are Sony 18650VTC4 2100mAh batteries really rated to 30A? I think with my wire gauge this battery should be able to handle .4ohm coils without a problem, since by I=V/R, my minimum safe ohms should theoretically be .12333 ohms. While I was running the .3 ohm setup the battery never even got warm. I would rather not vent my first cell due to marketing hype or misinformation. I just want to clear this up.

Thanks.

The VTC4 is a safe battery to use. I use them exclusively at the moment. I have built .25 ohm coils and run them just fine as the VTC4 has a pulse limit of 60amps. I do however prefer a higher .5 or .6. The "4" in VTC4 is the model number. There is also a VTC3 with the same specs but only 1600 Mah.


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[FnMagic]

Awesome. Im going to rip this 30-wrap sloth out right now. The extra heat retentionof the obscenely long coils also has me re-dripping every 10 puffs, granted my trident only holds about 6 drips.

 

[DrillRX]

Awesome. Im going to rip this 30-wrap sloth out right now. The extra heat retentionof the obscenely long coils also has me re-dripping every 10 puffs, granted my trident only holds about 6 drips.

Here's on of my favorites. It's a 0.6 with 27 gauge nichrome. It'll hold between 15 and 20 drops.

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[dougward1960]

so how does it hit. looks like it would hit real well. btw guess im a noob too first post but been reading here for awhile and really like to see when people try different coil ideas.

Doug

 

[Steam Turbine]

since by I=V/R, my minimum safe ohms should theoretically be .12333 ohms. While I was running the .3 ohm setup the battery never even got warm. I would rather not vent my first cell due to marketing hype or misinformation. I just want to clear this up.

Thanks.

Assuming no voltage drop, fully charge battery running a .12333 ohms coil would pump 34.05497 amps and 143 watts (yeah 143 watts!!!). since 34.05497 amps is higher than 30 amps, your coil is not a safe coil.

Just a friendly reminder, I'm pretty sure it happened to a lot of us, you wrap a nice coil, measure it (let's say 0.6ohm), all is good so you fill it up and vape, then you measure it again and you noticed that it dropped 0.1 ohm in resistance it is now 0.5 ohms.

If this happens with a 0.2 ohm coil. you'll end up at 0.1 ohm. No Battery Can Handle 0.1 ohm. So watch out for this.

 

[Sticky4King]

Here's on of my favorites. It's a 0.6 with 27 gauge nichrome. It'll hold between 15 and 20 drops.

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That is a really cool idea. I'm going to experiment with some different wrap ideas so far I've just been doing basic microcoils and sitting at a 0.5ohm with wick around the coil rather than inside I've been getting good cool vapes and plenty of vapor.

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[FnMagic]

Assuming no voltage drop, fully charge battery running a .12333 ohms coil would pump 34.05497 amps and 143 watts (yeah 143 watts!!!). since 34.05497 amps is higher than 30 amps, your coil is not a safe coil.

Just a friendly reminder, I'm pretty sure it happened to a lot of us, you wrap a nice coil, measure it (let's say 0.6ohm), all is good so you fill it up and vape, then you measure it again and you noticed that it dropped 0.1 ohm in resistance it is now 0.5 ohms.

If this happens with a 0.2 ohm coil. you'll end up at 0.1 ohm. No Battery Can Handle 0.1 ohm. So watch out for this.

No, I never built a .123 ohm coil. Just a .3, which I promptly rebuilt. Im doing .7 ohms right now and its my favorite one yet, especially since I can use my 7A safety fuse with it. I also recheck my resistance obcessively. Before wicking, after wicking, after reassembly, after filling, then I screw the atomizer down and test the entire top assembly at the pin and the body (maraxus mod). I might mention that ive done quite a bit of analytical and inorganic chemistry lately and I am acutely aware what kind of carnage batteries can produce, which was my reason for posting to double check the specs on my battery.

@DrillRX: That is an awesome coil. I might have a go at it for my next build, which will be happening in the next few weeks when I get some thinner kanthal. The stuff I have now is a bit like coat hanger. I solved my capacity issue by stuffing the chamber with a few inches of extra silica, now it can hold around 15 drops. My new coils also work much better, using only 18 wraps total. They respond quickly, and produce a LOT more vapor with no juice popping.

I wanted to add a funny story. I was standing outside with some friends tonight and it was about 8 degrees F.They made a comment about how I was blowing bigger clouds than they were with their cigarettes. Indeed the cold air was condensing my vapor so quickly, each exhale produced a solid white cloud the size of a large beach ball that just drifted towards the ground. Very awesome.

 

[Sticky4King]

For anyone kinda interested here is what I'm working with. Since I've been building I noticed a lot how the wicking effects the vapor. I'm using 28g and the coils sit at 0.4ohm with 10 wraps around 1.4mm micro screwdriver.
The wicking is cotton balls rolled out and then twisted to get through the coil, then I wrap them around and and kind of weave it around and between this pic shows how if you can see.

I am getting 3 pretty thick lines of smoke coming out of it. My question is why does the smoke spew out of underneath the coil outwards.

Sent from my HTC One using Tapatalk

 

[Sticky4King]

Sorry the wick is wet I'm tinkering with it as I'm posting

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[Revelene]

Assuming no voltage drop, fully charge battery running a .12333 ohms coil would pump 34.05497 amps and 143 watts (yeah 143 watts!!!). since 34.05497 amps is higher than 30 amps, your coil is not a safe coil.

Just a friendly reminder, I'm pretty sure it happened to a lot of us, you wrap a nice coil, measure it (let's say 0.6ohm), all is good so you fill it up and vape, then you measure it again and you noticed that it dropped 0.1 ohm in resistance it is now 0.5 ohms.

If this happens with a 0.2 ohm coil. you'll end up at 0.1 ohm. No Battery Can Handle 0.1 ohm. So watch out for this.

This is absolutely true. So many people think just because their battery can handle up to 30A that they are actually able to push that amount of current... what many don't understand is that the amp limit is REALLY THE ULTIMATE LIMIT... assuming everything is perfect (which it never is) and not taking into account voltage drop/drift and resistance drift on a fully charged battery at 4.2V on a battery rated at 30A maximum current, your lowest resistance possible can be 0.14... obviously never make a coil that low since NOTHING is ever exact, many variables could not be precise, and it is NEVER a good idea to run a battery at its maximum current as there is no head room for error and the stress can damage the battery (and you).

I like to run my coils all the way down to 0.3 ohms sometimes and typically (depending on the build) I'm only pushing somewhere around 13-14A current... about half of the amp limit of the VTC4 (30A) and am around 50 or so watts of vaping. If 50 watts is not enough... wow. A lot of cloud chasers still don't realize that you need good wicking and airflow, not just more power.

 

[Revelene]

For anyone kinda interested here is what I'm working with. Since I've been building I noticed a lot how the wicking effects the vapor. I'm using 28g and the coils sit at 0.4ohm with 10 wraps around 1.4mm micro screwdriver.
The wicking is cotton balls rolled out and then twisted to get through the coil, then I wrap them around and and kind of weave it around and between this pic shows how if you can see.

I am getting 3 pretty thick lines of smoke coming out of it. My question is why does the smoke spew out of underneath the coil outwards.

Sent from my HTC One using Tapatalk

Indeed, wicking is a big factor when it comes to vapor. The vapor spewing out of underneath the coil outwards is normal, it has to go somewhere as it wants to flow up.. some of it will go up the center and some will go out the side. It is completely normal and is a good thing.

 

[Bunnykiller]

ICR + MECH + sub ohm = bad news

 

[DrillRX]

For anyone kinda interested here is what I'm working with. Since I've been building I noticed a lot how the wicking effects the vapor. I'm using 28g and the coils sit at 0.4ohm with 10 wraps around 1.4mm micro screwdriver.
The wicking is cotton balls rolled out and then twisted to get through the coil, then I wrap them around and and kind of weave it around and between this pic shows how if you can see.

I am getting 3 pretty thick lines of smoke coming out of it. My question is why does the smoke spew out of underneath the coil outwards.

Sent from my HTC One using Tapatalk

If you want to be able to "direct" your vapor in a particular direction for some reason, look up nano dragon coils. The vapor will flow the way your coils are oriented with them.