Question for cotton wick users:

[Lessifer]

I bought my aw imr 18490 1100mah batteries from kidney puncher, and the description on the site says max continuous discharge rating: 8C

I've seen that 15C thrown around on here before, but I haven't seen it listed as a product spec on a site selling the batteries, so I'll stick with what the retailer says on this one. I'd rather err on the cautious side.

http://www.kidneypuncher.com/aw-imr-18490/

 

[OuchingMegaSpank]

So continuous discharge is my main concern. Is that correct?


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[Myrany]

ok lets do it this way

Using this tool Ohm's Law Calculator

on my gripper Mech I use an EFest 18350 battery (rated for 6.4 Amos by your chart)

If I put a 1.5 ohm coil on it
and a fully charged battery 4.2 volts

I put the ohms in the resistance line of the calculator 1.5
I put the 4.2 in the voltage line

Then hit the calculate button it tells me the current requirement is 2.8 Amps
the batterys have a 6.4 limit so 2.8 is fine with a little margin for safety

Now if I was to do a .5 ohm coil on the same battery and mech I would end up with an 8.4 Amp requirement which this battery can't even pretend to handle and probably major venting/explosive results

 

[OuchingMegaSpank]

Thanks guys! I got it!


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[degnr8]

Hope I didn't come off as condescending ouch, just don't wanna see you with a major ouch. Save that for the subs

 

[John_]

It depends on what is in the juices you're using. Generally the darker the liquid the faster it will ruin a wick/coil. The darker liquids generally leave behind more "gunk" when they are vaporized. It all depends on what is in the liquid though, if you have a clear juice that's full of sweetener it might kill a wick way before a dark juice does. I've killed wicks in less than a day but I was vaping a sweet dark liquid so it never really stood a chance.
I used generally a few times because there may be some element in your liquid that throws all of this off, maybe there's PGA in your liquid? Generally though, darker/sweeter = a shorter wick life.

One of the great benefits of cotton is that compared to other wicking materials, it is one of the easiest to re-wick. You can keep the same coil(s) for a long time and just keep re-wicking them, usually.

 

[bones1274]

OP-What kind of setup are you using? You never said.

 

[Vwls]

After vaping cotton for a while, you're going to know by the flavor when it's time to re-drip. Before it gets so dry that it would potentially scorch, it imparts a slight cottony taste. As soon as you taste that, stop, and look at your cotton. You'll see it is starting to look a bit dry. This is fool proof.

Tried cotton for first time the other other day. I have to say I was a little freaked out by how smooth the vape is! Once I got past that, I simply enjoyed it. However, it did not take but a few hours before my vape began to thin out. I tried using thicker pieces and thinner pieces. Both started out well and then seemed to diminish quickly. I was using 28g kanthal micro coils (dual) 8wraps. Don't know ohms. I used short wicks through coils then put cotton "clouds" underneath coils. My questions are:

How often do you find you must replace your cotton? How do you tell when it is time to do so?

I assume switching flavors means replacing wicks? (Haven't tried switching yet. Temporarily went back to ekowool.)

I know you don't want to fire on a dry cotton wick, but how dry can you let them get after soaking them with juice? Do you just add more when your flavor seems to get light?

Thanks, all




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[OuchingMegaSpank]

OP-What kind of setup are you using? You never said.

I WAS using a magneto with an igo-w until today when I received this:

!


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[K_Tech]

So continuous discharge is my main concern. Is that correct?

That is correct. You want to make sure that your calculated amps do not exceed the maximum rating of the battery.

Look for vaping apps for your iPhone; I have an Android and use "Vape", I'm sure there's something similar for your phone. Little stuff like the ohm's law calculator can come in handy, especially if you're running your own coils on mechs.

And FWIW, take a look at the "Two cents for safety" vapesafe fuse. It'll protect you and your battery in case you somehow experience a hard short.

 

[Steam Turbine]

I bought my aw imr 18490 1100mah batteries from kidney puncher, and the description on the site says max continuous discharge rating: 8C

I've seen that 15C thrown around on here before, but I haven't seen it listed as a product spec on a site selling the batteries, so I'll stick with what the retailer says on this one. I'd rather err on the cautious side.

AW IMR 18490 - Kidney Puncher

Just to make sure everybody understands the difference between C and A

"A" is pretty simple it means amp so when you read the specs of a battery and see something like:

Max. continuous discharge rate: 15A

You know that the amp limit is 15 amps.

However if you see something like:

max. continuous discharge rate: 15C

This is not the amp limit of the battery, it is its "c rating". Now, you can figure out the amp limit of a battery by using the C rating pretty simply by doing some math: (C rating x mAh) / 1000 = amp limit or more simply C rating x Ah = Amp limit

So we can figure out that a 1100 mAh battery like this one with a C rating of 8C has an amp limit of 8.8 amps:

8C x 1100 mAh = 8 800
8800 / 1000 = 8.8 <- this is the amp limit

Note that it is only a coincidence that the C rating and amp limit of this perticular battery have almost the same value.

If we take a 700 mAh battery that as a C rating of 10 then:

10C x 700mAh = 7000
7000 / 1000 = 7 amps

 

[Lessifer]

Right, that's what I said in my first post in this thread. I'm not sure where the 15C(16.5A) number that the OP listed in post #20 comes from, though I have seen it on this forum before.

 

[OuchingMegaSpank]

Right, that's what I said in my first post in this thread. I'm not sure where the 15C(16.5A) number that the OP listed in post #20 comes from, though I have seen it on this forum before.

The list I posted originally came off this forum, yes. I've been using it to do my shopping. I am only interested in the AWs and the big Sony. I appreciate your help on this stuff guys. I appreciate the info on "C" as well! Very helpful.

You guys got me so paranoid that when I received my Panzer with Atomic RDA, I decided to just throw on a 5wrap 30g single coil with a bit of ekowool and called it a night!

I tell you what, even with that one little coil, this thing KICKS!!

Oh, and that coil is 1.3

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[OuchingMegaSpank]

30amp Sonys on the way!


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[degnr8]

30amp Sonys on the way!


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There ya go. Those should be able to handle any coil you can.

 

[Krizzell]

Get an ohms meter or multimeter. I just pull the cotton out of the microcoil and replace it when the taste is off or change juice .Had the same coils for weeks.If you are below 1.2 the device will not read the ohms. Hope you are using good batteries.

 

[Thrasher]

I bought my aw imr 18490 1100mah batteries from kidney puncher, and the description on the site says max continuous discharge rating: 8C

I've seen that 15C thrown around on here before, but I haven't seen it listed as a product spec on a site selling the batteries, so I'll stick with what the retailer says on this one. I'd rather err on the cautious side.

AW IMR 18490 - Kidney Puncher

Right, that's what I said in my first post in this thread. I'm not sure where the 15C(16.5A) number that the OP listed in post #20 comes from, though I have seen it on this forum before.

maybe because that what several other trusted vendors list it at

AW IMR 18490 3.7v 1100mAh - Batteries

AW IMR 18490 (18500) 3.7V 1100 mah
IMR18490 Specifications :
Nominal Voltage : 3.7V
Capacity : 1100mAH
Lowest Discharge Voltage : 2.50V
Standard Charge : CC/CV ( max. charging rate 3A )
Cycle Life : > 500 cycles
Max. continuous discharge rate : 15C

too tired or i would go search CPF for some info.

 

[Mark Howard]

I agree with earlier post, the juice you use will effect the length of time before you need to replace the cotton. If I vape all day on a darker juice it will begin to deteriorate by the 2nd day, but a light juice or less use can go for days/week. IMO

 

[second2none]

About once a week I replace the wick, and dry burn the coil.
Usually because I see my juice turning yellow when it should be clear.

Wow I'm getting about 2 days - 6 tanks before my juice turns colors. I wander if its the flavor I use.

 

[generic mutant]

http://www.e-cigarette-forum.com/forum/polls/495668-cotton-wick-users-how-often-do-you-rewick.html


[hmm... For some annoying reason it's linking to the results, not the poll. The poll needs more results. Vote!]