My thoughts about sub-ohm and latest VV/VW devices...

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tj99959

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    Not sure why that's relevant to the Sigelei 100w.

    There are some 18650s (ICR) that could possibly explode if drawn over the amp limits. Most 18650s in use by vapers are IMRs, since they can support higher amp limits and are of a safer chemistry. In the event of a short or too high of an amp draw, IMR batteries vent instead of exploding.

    The Sigelei won't fire coils below 0.15 ohms, which is safe for high drain IMRs like the Sony VTC. The main concern in using stacked batteries is that the batteries must be matched - if using one old battery and one new battery, the batteries won't drain evenly. As long as batteries are matched pairs, it's not an issue.

    Regulated mods, by their very nature, are safer than mech mods.

    BOOM!

    There is more to using stacked batteries than just exceeding their amp limits, and matched pairs.

    There are just far to many "what ifs" when stacking batteries.
     
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    Aal_

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    Something I'm still not getting about the DNA30.
    The Max is 8.3V..30W ..and Current is 10A...so if I built a coil that was 1.5 ohms I would just crank the watts up until I found a sweet spot but, if I cranked that bad boy up to 20W that would be around 5V..How does a 3.7V battery put out 5V? Boggles my mind. I'm sure a techie can answer that one. I sure can't.
    By boosting. Will not get into technical how dc dc converters work, but think of it it takes more amp from the battery to give you more voltage.
     

    Sirius

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    By boosting. Will not get into technical how dc dc converters work, but think of it it takes more amp from the battery to give you more voltage.

    Ahh .. so the more boosting volts applied the shorter battery life. Same as with mechanical mods building very low sub ohm builds. Lower resistance= more watts. I see ty.
     
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    Aal_

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    Ahh .. so the the more volts applied the shorted battery life. Same as with mechanical mods building very low sub ohm builds. Lower resistance= more watts. I see ty.
    Well not exactly. Output voltage doesn't matter (nor resistance). Watts matter. If you set it at 15 watts, whether you use 3 ohm coil or 1 ohm coil, the board will withdraw the same amount of amps from the battery and the battery will last the same. Don't think using a higher ohms will save you battery, it is only and only lowering the wattage which would save you the battery.
     

    Sirius

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    Well not exactly. Output voltage doesn't matter (nor resistance). Watts matter. If you set it at 15 watts, whether you use 3 ohm coil or 1 ohm coil, the board will withdraw the same amount of amps from the battery and the battery will last the same. Don't think using a higher ohms will save you battery, it is only and only lowering the wattage which would save you the battery.

    OIC and Aal..thanks alot because I know nothing or little to nothing about these DNA mods. :thumbs:
     

    Ryedan

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    Temp control would be great for clearos and cartos. However, I think it's extremely unlikely that the industry will adjust for it, simply because of cost, and also because there's no reason to.

    Starter devices are mass produced, without too much of a concern on quality. Clearo is dead on arrival? No big deal, the consumer will just pick up another one. Product keeps moving, money keeps coming in - they're basically disposable anyway.

    Most are wired with thin gauge nichrome simply because that's what they started with, that's what they have in supply, and it's pretty cheap. Most rebuildables are using kanthal, which is arguably a better option, but I highly doubt starter devices are switching.

    Sure, there would be a market for starter devices with temperature control, but that would require switching entirely to nickel 200, or offering two different versions of the same product. I don't see that happening. Secondly, starter devices would require a battery that can support low ohm coils. A 700 mah cigalike battery ain't gonna play nice with a 0.2 ohm coil.

    Temperature control, based on the market and current technology, is probably not going to be very mainstream anytime soon. Gotta use nickel 200 wire, gotta have batteries that can support sub ohm, and gotta have a chip capable of sampling coil resistance several hundred times a second. The industry isn't going to jump on that just for a minute increase in sales.

    BOOM!

    Sorry, I didn't see your post until now Frocket. I think the cost difference in high volume cigalike or eGo class production for a different wire type is less than a penny per unit. Yes, that adds up, but being able to sell more volume will overcome that fast. Volume is profit in any business and I think that's the reason this will be developed.

    Low ohm coils do not require any more battery amp draw than high ohm coils as long as the watts are the same and watts are what count in vaping. So, the first company to miniaturize the size of VW regulation that includes temperature control probably wins a big share of the high volume cigalike/eGo market. How much would this cost per unit? Well, if it costs $10 per DNA40 for the temperature control and all the other upgrades at current DNA40 volume, I would think in terms of pennies again.

    IMO the biggest problem for manufacturers is the uncertainty of potential market regulation in the US and Europe right now.
     

    MattB101

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    I'm picturing a 250 watt or bigger "mod" with an RBA made out of 1-1/4" stainless pipe so a coil 3/8" in diameter will fit in. Then you get one hit before the wick goes dry.

    LOL actuall LMFAO

    Sent while presently sitting on my .... watching mind numbing prattle on the TV. 257 Channels and nothing on.
     

    MattB101

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    My local showed me the ZNA 50, and I was hugely intrigued. Part mech, part VW/VV. But, at $120, hard to justify in my mind. I can't justify a 20 watt because I like to vape around 15 on my mech, and if I stick with 20 watt, no room to push my coils to higher wattage. A 30 watt probably would work, but 100 would be way to much.

    Just because it has the wattage available doesn't mean that you have to use it. Just makes somewhat future proof. Notice I said somewhat, at the rate things are changing who the heck knows?

    Sent while presently sitting on my .... watching mind numbing prattle on the TV. 257 Channels and nothing on.
     

    Sirius

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    Just because it has the wattage available doesn't mean that you have to use it. Just makes somewhat future proof. Notice I said somewhat, at the rate things are changing who the heck knows?

    Sent while presently sitting on my .... watching mind numbing prattle on the TV. 257 Channels and nothing on.

    Matt -- That is the only reason I even ordered a DNA30. I doubt I will ever even go beyond 20W.
     

    MattB101

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    And that's the reason I wouldn't have one.

    How quickly we forget
    Electric Cigarette Explodes in Fla. Man's Face - ABC News

    One idiot doesn't make it a national problem. I have only heard of around 3 "battery explosions" since I started vaping. Out of the total number of vapers out there that is a fairly statistically insignificant number. Of course not insignificant if you were the one it blew up on.

    Sent while presently sitting on my .... watching mind numbing prattle on the TV. 257 Channels and nothing on.
     

    awsum140

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    Matt, I just noticed you avatar...thank you for serving.

    Stacking batteries can be dangerous. The problem is when people get careless with them. It only takes a single mistake for things to go wrong and with stacked 18650s there is a very significant amount of power available if something does go wrong. I have stacked 18350s and it is a pain tracking the pairs and monitoring voltage when removed from the device and from the charger. It was fine when I need extra power out of a Vamo for a few days, but I don't want the hassle on a day to day basis.
     

    Aal_

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    Matt, I just noticed you avatar...thank you for serving.

    Stacking batteries can be dangerous. The problem is when people get careless with them. It only takes a single mistake for things to go wrong and with stacked 18650s there is a very significant amount of power available if something does go wrong. I have stacked 18350s and it is a pain tracking the pairs and monitoring voltage when removed from the device and from the charger. It was fine when I need extra power out of a Vamo for a few days, but I don't want the hassle on a day to day basis.
    In a vamo it is not as harmful as in a mech.
     

    tj99959

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    One idiot doesn't make it a national problem. I have only heard of around 3 "battery explosions" since I started vaping. Out of the total number of vapers out there that is a fairly statistically insignificant number. Of course not insignificant if you were the one it blew up on.

    Sent while presently sitting on my .... watching mind numbing prattle on the TV. 257 Channels and nothing on.

    I'm going to state a personal opinion at this point:

    So all this talk about the DNA40 with 0.05 ohm coil, stacking batteries, ultra sub ohm vaping, 200 watt PVs. DAMN MAN!!!! how deep a grave do we want to dig?!?
    So that 0.05 ohm coil works fine in the DNA40. How long will it be before folks thinks it's the norm in mods without temp control? How about if that DNA chip failed? (you can turn the temp control OFF ya know)

    We have been harping on battery safety for years, now all of a sudden we have those same unsafe practices heralded as perfectly safe.
    We have already exceeded the amount of vapor production that the human lung is capable of inhaling ... yet we want more.

    When will this dog get tired of chasing it's tail?!?
     

    KenD

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    I'm going to state a personal opinion at this point:

    So all this talk about the DNA40 with 0.05 ohm coil, stacking batteries, ultra sub ohm vaping, 200 watt PVs. DAMN MAN!!!! how deep a grave do we want to dig?!?
    So that 0.05 ohm coil works fine in the DNA40. How long will it be before folks thinks it's the norm in mods without temp control? How about if that DNA chip failed? (you can turn the temp control OFF ya know)

    We have been harping on battery safety for years, now all of a sudden we have those same unsafe practices heralded as perfectly safe.
    We have already exceeded the amount of vapor production that the human lung is capable of inhaling ... yet we want more.

    When will this dog get tired of chasing it's tail?!?
    It's amp draw that counts, not the resistance by itself. The DNA40 won't go over 40 watts however you try, even if you turn off the temperature control, and it's arguably the safest device out there at the moment (yes, safer than the Provari even).
     

    tj99959

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    It's amp draw that counts, not the resistance by itself. The DNA40 won't go over 40 watts however you try, even if you turn off the temperature control, and it's arguably the safest device out there at the moment (yes, safer than the Provari even).

    Right up until it fails to function properly ........... or ............. until you FORGET to turn the temp control back on. When dry, that coil will get DAMN HOT at 40 watts!!!

    Murphy's Law will always reign supreme!

    Right now we seem to place to much reliance on "when used properly". The average person out there doesn't even know what that means!!
     
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    Ryedan

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    Right up until it fails to function properly ........... or ............. until you FORGET to turn the temp control back on.

    If any regulated device fails the wrong way it's going to be bad. In this case if someone forgets to turn the temp control back on the watt control is still active and that is what keeps the battery safe.

    It's way safer than any mech mod.
     

    DavidOck

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    I'm going to state a personal opinion at this point:

    So all this talk about the DNA40 with 0.05 ohm coil, stacking batteries, ultra sub ohm vaping, 200 watt PVs. DAMN MAN!!!! how deep a grave do we want to dig?!?
    So that 0.05 ohm coil works fine in the DNA40. How long will it be before folks thinks it's the norm in mods without temp control? How about if that DNA chip failed? (you can turn the temp control OFF ya know)

    We have been harping on battery safety for years, now all of a sudden we have those same unsafe practices heralded as perfectly safe.
    We have already exceeded the amount of vapor production that the human lung is capable of inhaling ... yet we want more.

    When will this dog get tired of chasing it's tail?!?

    Having only read the specs once, I may not be recalling this correctly, but unless you're using Nickel 200, you aren't going to be in temp control mode. How likely is it that every user is going to be so conscientious that ALL their toppers have that wire? Or just decide that a flavor they want to vape at the moment, in a different topper with kanthal, is what they want on top at the moment? And then crank it up to enjoy, thinking the temp control will protect them?

    :2c:
     

    DavidOck

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    If any regulated device fails the wrong way it's going to be bad. In this case if someone forgets to turn the temp control back on the watt control is still active and that is what keeps the battery safe.

    It's way safer than any mech mod.

    Agreed. It's hard to make anything idiot-proof.
     
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