Today I bought a efest 3400mAh 18650 3.7V today to go with my nemesis mod. I also have a steam turbine, and I did a rebuild today that has .85 ohms. I've been reading up in the battery I purchased since I didn't have any prior experience with it, and now, frankly, I'm terrified. I've read mixed things on this forum about this particular battery. Some people say hey, it works fine, others are saying my face is going to blow up or I'm poisoning myself. If I did my math right, I should be in the safe zone of ohms; but I need help. I'm honestly too scared to even vape now.
I'm a little terrified
- Thread starter Krystal Kay
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Just dont use it anymore take the lost, gift it, sell it whatever the case may be as long as your not comfortable with it then makes no sense in using it
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When doing sub-ohm builds, you MUST know the amp limit of the battery being used. Do you know the amp limit of that particular battery?
I don't. But I do know that you should be using a high drain battery with sub-ohm coils. I don't know of any high drain battery with over 2900mAH. Your battery has 3400mAh so I'm inclined to believe it is not a high drain battery. It likely is a protected ICR battery, and those generally only have a 3 - 4 amp limit.
Using the Ohm's Law Calculator: 4.2 volts and 0.85 ohm = 5 amps (current) draw from the battery. You would be over that battery's amp limit.
Battery Basics for Mods: IMR or Protected ICR?
I don't. But I do know that you should be using a high drain battery with sub-ohm coils. I don't know of any high drain battery with over 2900mAH. Your battery has 3400mAh so I'm inclined to believe it is not a high drain battery. It likely is a protected ICR battery, and those generally only have a 3 - 4 amp limit.
Using the Ohm's Law Calculator: 4.2 volts and 0.85 ohm = 5 amps (current) draw from the battery. You would be over that battery's amp limit.
Battery Basics for Mods: IMR or Protected ICR?
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you're absolutely right. i thought id take a risk and get a battery with "longer life" instead of the sony battery i was originally going to buy. I'm taking back my efest today and I'm getting a sony 18650 battery. with me doing a lot of sub ohm builds, theres no need for me to be taking extra risks. I'm glad i didn't even use it yet.
You would be over the constant current amp limit. This is considerably different from a temporary current draw. This thing can take a steady 3400mA drain for an hour in one go. Doing 5000mA drains for 6 seconds at a time isn't a problem at all.
Dude, I don't know what you're talking about. I'm talking about two different battery chemistries here.
The 3400 mAh battery that the OP has is most likely an ICR battery. These batteries only have a continuous discharge rate of 3 - 4 amps.
The batteries required for sub-ohm coils must be high drain batteries; they must have at minimum 10 amp continuous discharge rate. Sub-ohm below 0.8 should be using a battery with 20 - 30 amp continuous discharge rate, factoring in a margin of safety headroom.
You came up with the 5A calculation yourself.
So you're saying you need a minimum of 10A continues discharge rate to power a device that only surges 5A in peaks?
I'm not saying it's wise to use an ICR (which I should have added to my post) but for the rest it's just a matter of Ohm's law.
And it shouldn't be a problem for a 3400mAh battery with a 3.4A continues discharge rate to handle 5A peaks (1.5C).
So you're saying you need a minimum of 10A continues discharge rate to power a device that only surges 5A in peaks?
I'm not saying it's wise to use an ICR (which I should have added to my post) but for the rest it's just a matter of Ohm's law.
And it shouldn't be a problem for a 3400mAh battery with a 3.4A continues discharge rate to handle 5A peaks (1.5C).
No, I didn't come up with the 5 A calculation myself. I used Ohm's Law. You do the math. 4.2 volts with a 0.85 ohm coil will draw 5 amps current from a battery. Ohm's Law Calculator.
I've done my research on battery chemistries, how regulated mods use pulse width modulation to make higher voltage output from 3.7 volt batteries, etc. Pulse generating APV's may need to generate up to twice the voltage of the user's set voltage (the mean), which can be up to twice the amp requirements of a battery.
ICR batteries with amp limits of 3 - 4 amps will be inadequate for this application. This is explained in the following discussion by the tech engineers at Provape:
Question for the tech engineers at Provape
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If scared why not vape a safe chemistry smaller 18350 with a 1.6 ohm sxd style micro. Excellent vapor and less stored energy should she vent. I used 18350 exclusively for about 2 years and they work great. Only takes seconds to swap batt. My current go to batt is 18500; one charge typically lasts till sun sets.
Topic starter is talking about a Nemesis mod so PWM is not an issue here, just Ohm's law.
I can't help feeling your response is a bit hostile but the only thing that matters in this case is Ohm's law. User has a mechanical mod with an 0.85 coil running at 4.2V. This draws a peak surge of 1.5C from his ICR battery which is within the specs of the battery. That's why I pointed out that the rating for maximum continuous discharge rate is something else than maximum peak discharge.
But hey, at least we agree on the fact that it's wiser NOT to use ICR and choose IMR
[edit] Did a read up on this cell and it's rated 2C maximum discharge rate (6.8A) with a peak discharge rating of 12A (5-6 seconds). But the Efest version has a protection circuit which kicks in at 5.8A so you can't go above that. So the 5A current draw is well within the specs of the battery and it's as "safe" to use as any other ICR battery (read; you'd feel safer with a lower mAh Li-Mn battery.) [/edit]
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Man guys, this and the other posts on this topic can be very confusing. And I dont mean because of mathematics, but because some of you post something as fact then retract it later or "stand corrected" when someone calls you on it. May I PLEASE suggest if you are not 10000% sure of what you are posting then say nothing at all. Some people may not get to the post where you admitted a slight error and end up leaving here with incorrect info.
These stinkin batteries have been the only source of indigestion for me with my new vape (SVD). I thought I saw a great deal on the Panny'/s NCR18650B's 3400mAh and it seems that was a wrong call. BUT, with the back and forth its kind of hard to tell.
SOOOO since my pannys are already coming to me...on a freight train, with good ole loving. Can I or can I not SAFELY (economy is out the window, I already bought em) use them in an Innokin SVD which is VV/VW, for the 1000 charges they advertise? (they are unprotected models) It seems with all the protective circuitry in these Mods and Intelligent chargers they should be fine. Otherwise Ill go buy some Panny 18350 PF's I guess.
Ps the lowest Ohm tank I have is the Nautilus Aspire at 1.6 and I never seem to vape above 10-11W which is 2.62Amps.
These stinkin batteries have been the only source of indigestion for me with my new vape (SVD). I thought I saw a great deal on the Panny'/s NCR18650B's 3400mAh and it seems that was a wrong call. BUT, with the back and forth its kind of hard to tell.
SOOOO since my pannys are already coming to me...on a freight train, with good ole loving. Can I or can I not SAFELY (economy is out the window, I already bought em) use them in an Innokin SVD which is VV/VW, for the 1000 charges they advertise? (they are unprotected models) It seems with all the protective circuitry in these Mods and Intelligent chargers they should be fine. Otherwise Ill go buy some Panny 18350 PF's I guess. Ps the lowest Ohm tank I have is the Nautilus Aspire at 1.6 and I never seem to vape above 10-11W which is 2.62Amps.
Man guys, this and the other posts on this topic can be very confusing. And I dont mean because of mathematics, but because some of you post something as fact then retract it later or "stand corrected" when someone calls you on it. May I PLEASE suggest if you are not 10000% sure of what you are posting then say nothing at all. Some people may not get to the post where you admitted a slight error and end up leaving here with incorrect info.
These stinkin batteries have been the only source of indigestion for me with my new vape (SVD). I thought I saw a great deal on the Panny'/s NCR18650B's 3400mAh and it seems that was a wrong call. BUT, with the back and forth its kind of hard to tell.
Ps the lowest Ohm tank I have is the Nautilus Aspire at 1.6 and I never seem to vape above 10-11W which is 2.62Amps.
OK, I have spoken out frequently that the Panasonic (and Orbtronic) NCR18650B 3400mAh batteries will "work" in a regulated mod and probably be "safe", however they are not the "ideal" batteries to use in a regulated mod which uses pulse width modulation.
The 3400 mAh Panny's have 6.8 amp limits, where all 18650 IMR batteries have at least 10 amps. These Panny's are a hybrid chemistry with the chemistry heavily weighted to the ICR end of the fence, so they are more like an ICR than an IMR battery because of their high internal resistance. They are not high drain like an IMR. They are still a safe-chemistry battery, however since they use nickle and manganese.
Being that they are not high-drain, have only a 6.8 amp limit, and have a high internal resistance they will not allow a regulated mod to perform at its optimum level. Any high drain 10 amp 18650 with lower internal resistance will allow your SVD to perform at a performance level which you expect it to.
You wanted facts or scientific evidence. I base the above on what the tech engineers at Provape have to say about high drain batteries and pulse regulated mods like the Provari. Read both links below for the technical explanation.
Why High Drain Batteries?
Question for the Tech Engineers at Provape
There's more to choosing the best battery for a mod than just choosing a battery with the highest mAh rating available, which many vendors and consumers seem to do. Besides mAh rating, one should also factor in the amp rating, the internal resistance, and whether the battery is high drain is just as important to know. The Panasonic (and Orbtronic) NCR18650B 3400mAh batteries are a great battery for low drain applications such as flashlights. For regulated mods...not so much.
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Yep I did read that early in the thread Baditude, and it got laundered and hit the spin cycle before I got to the end of the thread.....
Thanks for posting it again, I just read another thread where two members were disagreeing on wether they are 6.8(2C) or 3.4(1C) I need a Vape
Im gonna do this. When I get the batt's Ill try em out and maybe hit my B&M store this week and get an extra 2 IMR high-drain 18650's and see if I can ascertain any difference. Will report back
Thanks for posting it again, I just read another thread where two members were disagreeing on wether they are 6.8(2C) or 3.4(1C) I need a Vape
Im gonna do this. When I get the batt's Ill try em out and maybe hit my B&M store this week and get an extra 2 IMR high-drain 18650's and see if I can ascertain any difference. Will report back
personally,i don't think you should be doing sub ohm builds if you are not at least 100% sure your batteries are built to handle that kind of amp draw .
too many noobs are sub ohming and don't know what the hell they are doing !!
really harsh ? ? yea but it needed to be said
too many noobs are sub ohming and don't know what the hell they are doing !!
really harsh ? ? yea but it needed to be said
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