It's kind of like the amateurs who fire fireworks and bottle rockets on the 4th and on Labor Day. Many do this safely, but many do not. ER's hate these holidays.
New to mech mods, need solid battery advice
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Oops!!! Wrong type, a gross typo. They are NOT ICRs, please click the link. They're Efest IMRs
Humble apologies for the mixup. Now again, are they (Ef IMRs 800mAh) OK? Sorry for being a pest but even as my college deg is mechanical engineering all my pg studies are in management. Rechargable batteries were lead-acid when I got out of college and then for some time yet.
PS, I've got three days to return them unused for a refund.
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Oops!!! Wrong type, a gross typo. They are NOT ICRs, please click the link. They're Efest IMRs
Humble apologies for the mixup. Now again, are they (Ef IMRs 800mAh) OK? Sorrrry for being a pest but even as my college deg is mechanical engineering all my pg studies are in management. Rechargable batteries were lead-acid when I got out of college and then for some time yet.
PS, I've got three days to return them unused for a refund.
Haha alright, you should be okay with those as long as your not subohming. Save the subohming for the 18650s with a 30amp rating
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Those will be fine. However, I'm still not a fan of Efest as a brand - my
Those Efests are an 8 amp battery, while the equivalent AW batteries are a whopping 16 amps for just a couple bucks more.
Efest has a history of exaggerating their battery specifications, too. http://www.e-cigarette-forum.com/forum/general-e-smoking-discussion/562646-18350-mechs.html
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anumber1, I understand all that. My college studies were mech-eng (albeit totally rusty as then I mastered in business and pg'd in finance. Well, I'm now full tilt on research. Mechs pose no problems as their size usually allows all kind of safety devices; epipes however are limited by the small battery.
My electronics stop at basics, not enough to design a circuit board but I've been browsing alternatives. What do you think of "The Crown"? I also must say I don't use resistances under 1.5Ω in my epipe attys, ever. OTOH, I have good friends in the electronics field who can do a printed circuit.
Will prepare a requirement list tonight.
As your e-pipe is pretty much a sideways mechanical mod, all the same precautions apply.
At 1.5 ohms, you are safe with the popular imr 18350 batteries.
Checking your atomizer's resistance often would be good practice to avoid putting a low resistance or shorted one on your pipe.
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My bad - I should have stated EfeSt IMR 18350's more clearly - sorry if I caused any confusion.
I've used them, hence the recommendation - AW seem to be the go to still and if I had to buy any now, I'd go for AW now. I got the Efests with a APV a while back and there didn't seem anything wrong with them. So much so I bought another 18650 when I got my mech (no subohming in mind though)
Minefield these batteries are!
I've used them, hence the recommendation - AW seem to be the go to still and if I had to buy any now, I'd go for AW now. I got the Efests with a APV a while back and there didn't seem anything wrong with them. So much so I bought another 18650 when I got my mech (no subohming in mind though)
Minefield these batteries are!
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Most surely! It doesn't slip by me that as coils burn and age resistance drops –not by much tho. Thus, I always read them either on my traveling $10 blackbox ohm meter (which is quite consistent even if it errs on the minus side by 1.5Ω) or on my VW mods, eVic & Sigelei 20W.
In any case, I'll make a point of getting a few AWs in needed sizes ASAP.
Once more, you are a superb bunch... Many thanks in earnest guys!
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Musing about the irresponsible labeling of batteries by manufacturers, don't you feel standards (ISO, ASA, CE, NOM, whatever...) are urgent in the battery field and also forcing vendors to put real data on the packaging and/or labeling.
A "DOT Approved" style of mandatory testing would be welcome.
A "DOT Approved" style of mandatory testing would be welcome.
I wholehearted agree. One has to really dig for battery specifications as things stand now. The battery specifications for Efest are especially difficult to find and once you find some information somewhere, you have to question just how accurate it is.
AW on the otherhand, lists the battery specifications on a flashlight forum (Candle Power Forum), and if anything he understates those specs.
-- IMR16340 / IMR14500 / IMR18350 / IMR18490 / IMR18650 / IMR26500 *Part 2*
Are we grateful for Internet or not?
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I hate to have to say it Batitude but on the 18650 front AW just isn't relevant anymore their top LIMN battery is a 2000mah. The Sony VTC5 2600 mah has 30% more MAH and hits as hard. The Panasonic ncr18650pd is up around 2900mah or 50% more stamina. AW just hasn't kept up with the innovations in battery technology.
In 18350 though, I bought efest batteries at the same time I bought AW 18350 and the Efest didn't last nearly as many months.
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Actually, Tom, I agree with you to a point.
We share similar experiences with the Efest 18350 batteries. AW all the way here.
AW leads the way with the AW 18490 IMR with 1100 mAh and 16 amps continuous discharge rate (15C rating). No compitition here.
AW has fallen behind some in the 18650 size. Spec wise, others have taken the lead. However...
AW is still more likely to be found in most local vape shops than the Sony or Panasonic brand. Not everyone is comfortable purchasing online. I'm still convinced that if you buy an AW IMR 18650 you will get a consistantly high performing battery just because of the selection process that they go through before they are rewrapped and an AW sticker is applied.
I still have two of the original AW 18650 batteries that I purchased with my first mod almost 2 years ago. They are just now beginning to show their age and will need to be replaced soon. But to continue to perform for that amount of time like they were new is a testament to their high quality. I've never had a problem with any AW IMR (in all sizes), they've all been stellar performers battery to battery. I've had Efest IMR batteries which needed to be replaced after only 1 month of use.
I am surprised that AW has not come up with a higher mAh, higher amp battery. Currently only the 24 amp 1600 mAh AW IMR is available for sub-ohm.
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to be honest, i'm getting seriously curious about the samsung 25R. noticed a couple posts here and there boasting that they have a flatter output for longer than even the new front runner in the sony vtc family. i've yet to see it graphed and put through it's paces, though.
i think my next battery purchase will be 2 of the vtc5's and 2 of the 25R's unless something more promising comes along between now and then.
i think my next battery purchase will be 2 of the vtc5's and 2 of the 25R's unless something more promising comes along between now and then.
my AW's last longer than my PD's too. methinks high internal resistance leads to early voltage drop making the remaining capacity unusable in the pannys.
Exactly and completely true. The higher mAh rating of the Panasonics is not in the range useable in our mods.
The tech engineers at Provape had this to say about batteries like the Panasonics:
"BUT just as important, is the safer lithium ion chemistry and very low internal resistance of the AW cells. Other lithium-ion chemistry and higher internal resistance cells will not perform to the level of the AW cells and therefore reduce the overall experience when used. The cost of these other cells when comparing their performance and safety are just not worth it.
There are cells that claim to have the same or better capacity as the AW cell BUT their internal resistance is inferior. If the cell has a higher internal resistance it will drop more voltage when current is taken out and as a result the ProVari will indicate it is at end of charge when it could have a significant amount of capacity remaining.
What good is this capacity if it cannot be utilized by the ProVari? It is of NO use, so why use it?
We will ONLY recommend cells that our engineering tests show will allow the ProVari to perform at its best."
-- Question for the tech engineers at Provape
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