Seeing More Newbies going sub-ohm... Scary stuff.

[KenD]

EDIT: If so, I strongly disagree with that sentiment. So does Baditude, Rolygate, and Technonut. In fact, here is a spreadsheet that correlates max and continuous drain rates to safe ohms. Do not ignore this important rating of your battery!

Not disagreeing with anything else in your post, but on a quick glance at least the numbers for the purple efest 18350 (assuming that's the new efest battery) seem to be wrong. According to the information I've seen they have a c-rating of 15, and can handle 10.5 amps (not sure if that's continuous or burst). In the one test I've seen they perform about the same as aw 18350s at 2, 3, and 5 amp draws (and certainly better than the red efests), and while that in itself doesn't say much about their amp limit they do perform better than the aws in a 10 amp burst test.

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[B1sh0p]

Not disagreeing with anything else in your post, but on a quick glance at least the numbers for the purple efest 18350 (assuming that's the new efest battery) seem to be wrong. According to the information I've seen they have a c-rating of 15, and can handle 10.5 amps (not sure if that's continuous or burst). In the one test I've seen they perform about the same as aw 18350s at 2, 3, and 5 amp draws (and certainly better than the red efests), and while that in itself doesn't say much about their amp limit they do perform better than the aws in a 10 amp burst test.

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The numbers on the Sony's are wrong too. I wouldn't trust that chart.

 

[KenD]

The numbers on the Sony's are wrong too. I wouldn't trust that chart.

True, and those for the Samsung 20r as well. The idea of having a chart like this is good, but it's useful only if the information is correct.

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[Vwls]

Hmmm - that chart isn't correct for 18490, 1100 mAhs either. Weird. Toss that chart!

The chart I trust is this one (below) - I've managed to verify some of the info on it with reputable sellers of batteries (unfortunately, I've only inquired about the data for the batteries I actually use, but I think it's a well researched chart):

 

[Funk Dracula]

Are you saying that the CDR rating for batteries can be ignored since we use PVs in short bursts? Am I understanding that is what you meant to post?


EDIT: If so, I strongly disagree with that sentiment. So does Baditude, Rolygate, and Technonut. In fact, here is a spreadsheet that correlates max and continuous drain rates to safe ohms. Do not ignore this important rating of your battery!

That chart is full of malarky.

Anyhow, the shops doing this should be publicly called out here. I don't know if it's against ECF's TOS, but it certainly shouldn't be. If we can call a Provari an over-priced POS here on the forum, we should certainly be able to say "Such and such shop is doing this..." and leave their address and contact information.

They should be called out, right here on ECF, and concerned people should be able to contact them and tell them what they are doing is dangerous if it compels them.

What's the worst that could happen? The shop probably won't lose the walk-in business they're already getting, and they will maybe learn how to operate more responsibly. Maybe even become a respectable and contributing vendor to the vaping community, instead of a feared liability eh?

 

[Ryedan]

This battery chart is good too: SubOhmChart.pdf

 

[EddardinWinter]

Hmmm - that chart isn't correct for 18490, 1100 mAhs either. Weird. Toss that chart!

The chart I trust is this one (below) - I've managed to verify some of the info on it with reputable sellers of batteries (unfortunately, I've only inquired about the data for the batteries I actually use, but I think it's a well researched chart):

I like your chart better. Thanks!



Roaring thunderously via Tapatalk...

 

[jonhall2]

i myself am considering going subohm. really just want to try some 28ga. my target is .8ohm and i need a 3.7v 18650 mod to fire it. i have efest 2250mah hybrid batteries that should be safe. my question really is can anybody suggest an inexpensive mod to let me explore the territory. eventually i will get a zna30...lol.. good luck right?....that will provide protection and the variables i prefer. i cant expose my egos to this kind of abuse. my vamos do great down to 1.2ohms and it makes me curious. i do a little dripping with a cisco hh.357 and they were basically designed to be fired at 3.7v. also have a kayfun 3.1 and a nice RDA on the way. i will probably need another kayfun setup with subohm build. doing the clapton coil for my first kayfun when it arrives. any suggestions of a decent 510 connection 18650 battery holder with a button would be great. sorry if i stepped off topic but there were some folks still around this late

 

[EddardinWinter]

i myself am considering going subohm. really just want to try some 28ga. my target is .8ohm and i need a 3.7v 18650 mod to fire it. i have efest 2250mah hybrid batteries that should be safe. my question really is can anybody suggest an inexpensive mod to let me explore the territory. eventually i will get a zna30...lol.. good luck right?....that will provide protection and the variables i prefer. i cant expose my egos to this kind of abuse. my vamos do great down to 1.2ohms and it makes me curious. i do a little dripping with a cisco hh.357 and they were basically designed to be fired at 3.7v. also have a kayfun 3.1 and a nice RDA on the way. i will probably need another kayfun setup with subohm build. doing the clapton coil for my first kayfun when it arrives. any suggestions of a decent 510 connection 18650 battery holder with a button would be great. sorry if i stepped off topic but there were some folks still around this late

I don't like my Kayfuns for sub ohm. The device cannot provide sufficient air or e-liquid to the coil. 12-15 watts is about all that device can handle, in my opinion.

I use my Helios RDA for sub-ohm.

Do you have a multimeter? If so, and if you know what you are doing, I would get a mechanical device to try it. Wait to drop the big bucks on the zna once you know you like sub-ohm vaping.



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[Bunnykiller]

I'm still a little scratching head here so, just to make sure I got this right,
You are saying the person who is running a 0.25 ohm coil is running on a shorted out battery, right?

yup.. lets see how long that battery holds up without damaged under continious duty ( hold the button on till it runs out of voltage)

 

[Ryedan]

You're calling 0.499 ohm a short?

yup sure am .... especially with the amps I normally work with.
I consider a short as is:
a low resistance that causes damage to the power supply, wires leading to the load, and/or the load its self under continious duty. ( 100% duty cycle)

That's cool for your application Bunnykiller, but my PV's power supply (Sony 18650VTC4) will not even be breathing hard with a 0.499 ohm load. At 0.2 ohms it may start noticing it, but it still won't be breaking a sweat.

The power supply does not know what the resistance is. The safety issue is where are we in terms of over drawing the power supply. I think someone already pointed out something like this.

 

[Ryedan]

I don't like my Kayfuns for sub ohm. The device cannot provide sufficient air or e-liquid to the coil. 12-15 watts is about all that device can handle, in my opinion.

I use my Helios RDA for sub-ohm.

Do you have a multimeter? If so, and if you know what you are doing, I would get a mechanical device to try it. Wait to drop the big bucks on the zna once you know you like sub-ohm vaping.

Listen to the lion ^^^. Good advice

 

[Ryedan]

yup.. lets see how long that battery holds up without damaged under continious duty ( hold the button on till it runs out of voltage)

I'm not getting this either. You're saying I can't discharge my 30A continuous discharge rated Sony VTC4 at 15 amps until it runs down?

Well, I'm not going to try it, but I still call BS. I suspect Sony would not rate it 30A continuous if it couldn't even handle 15.

 

[B1sh0p]

I like your chart better. Thanks!



Roaring thunderously via Tapatalk...

Smh......10

 

[Jjshbetz11]

yup.. lets see how long that battery holds up without damaged under continious duty ( hold the button on till it runs out of voltage)

Well that's what those numbers in the chart mean. For reference the sony vtc4 is 30 amp CONTINUOUS meaning constantly under load until reaching its low voltage area. A good example would be a high current flashlight.

 

[jonhall2]

I don't like my Kayfuns for sub ohm. The device cannot provide sufficient air or e-liquid to the coil. 12-15 watts is about all that device can handle, in my opinion.

I use my Helios RDA for sub-ohm.

Do you have a multimeter? If so, and if you know what you are doing, I would get a mechanical device to try it. Wait to drop the big bucks on the zna once you know you like sub-ohm vaping.



Roaring thunderously via Tapatalk...

thanks ed, along with the kayfun i ordered a helios rda clone and an ohm meter. i had been measuring ohms with my vamos and well it was just time to get an ohm meter dedicated to builds. this morning i ordered a sigelli extendable mod that will accept 18350 or 18650 batts. thanks for the tip about kayfun subohming. i am sure it will get a trial at some point but, i will be using the helios with the efest IMR18650 10 amp setup for my first subohm testing. on a fresh charge of 4.2v that would be pushing well over 15 watts maybe 20. my power chart only goes down to 1.2 ohm for reference. should i discharge the battery with at least a two ohm coil until it is closer to 3.7v output before using .8ohm rda? or just go for it? anybody with any input please chime in. thanks to all and ecf, happy vaping

 

[EddardinWinter]

Smh......10

You are shaking your head...at...what?

Oh wait, I get it!

I can see how my decision to compliment another poster (when they provide information better than what I did) would be baffling to you...I see it now. Carry on.

 

[B1sh0p]

You are shaking your head...at...what?

Oh wait, I get it!

I can see how my decision to compliment another poster (when they provide information better than what I did) would be baffling to you...I see it now. Carry on.

No. Yours should have said..."sorry for posting that false information in a thread about safety"

I have no problem ever admitting when I'm wrong.

 

[Captain_puffs]

My local B&M (head shop) has no idea what a mech is, yet they sell them. The girl behind the counter looked at me like I was crazy when I asked if they carry Sony us18650 vtc4 30a batteries. (They did... yay!) I ended up sitting in there for a couple of hours going over their inventory with them. The owner just threw a pretty girl behind the counter. She had no idea what a cartomizer even was! This place should not be selling mechs!

 

[BillyWJ]

Was it "adolescent" when people started using LR cartos? It's the same concept.

The jealousy of the sub ohm vapor is puzzling to me.

No, but it's adolescent to call people ignorant, afraid, and jealous, when they're not.