Efest 18650 Batteries not Lasting!!

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Just get your batts at RTD vapor, they have the sony's, Randy does not have ANY counterfeit batts.

I don't think they sell samsungs, look elsewhere to the other sites people gave you here.

Your other possibility is maybe think about moving to a dual-battery mod.

A few weeks lates, but for anyone else (like me) reading this after the fact looking for info... RTD does carry Samsungs, looks like they started right around this year.

great everyday price too!
Samsung INR18650-25R 2500mAh - RTD vapor
 

beckdg

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Hmmm well I need a battery that is rated @ 30A at the very least considering I will be vaping a .2 ohm coil in the future.

you might as well forget that.

vtc series is the only true 30 amp cells ever to hit the market. they're all either not being produced or there's more fakes than real ones (vtc4).

your 20 amp cell is likely a rewrapped 6 amp cell.

your 35 amp cell is most definitely a rewrapped 20 amp cell.

efest doesn't manufacture batteries. they rewrap them... and inflate the specs to increase sales.

high internal resistance is likely contributing to severe voltage sag which then results in early cutoff in a regulated mod and either short charge life or damage in a mech.

rethink your batteries. samsung and lg would be good alternatives. rethink your preferred resistance also.
 

beckdg

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A few weeks lates, but for anyone else (like me) reading this after the fact looking for info... RTD does carry Samsungs, looks like they started right around this year.

great everyday price too!
Samsung INR18650-25R 2500mAh - RTD vapor

over priced IMHO.

but if you want to go with a trusted seller, that's the place to go.
 

beckdg

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I own 8 efest 18650 batteries and have no problems with them. I love them - I use them on rotation. Didn't know where was so much hate towards them.

no hate. just knowledge. knowing that they're ripping you off and lying to you at best is priceless. i don't need to know more, personally.
 

Thrasher

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no hate. just knowledge. knowing that they're ripping you off and lying to you at best is priceless. i don't need to know more, personally.

+ 1
There's so much bs going on these days with batteries, for the first time in years of vaping. Mods exploding, batteries venting, mystery " competition" battery companies appearing out of thin air. We need to be smart and safe and companies misrepresenting their batteries in an age where 25 amp builds are popular should not be tolerated.
 

beckdg

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I am ready to believe. Are Sony's cheaper than Efest's?

everything efest rewraps is cheaper in it's original wrapper as far as i've seen.

the he2's efest rewraps and calls 35 amps can sometimes go head to head with the samsung 25Rs that can be had for around $6 for example. (both rated 20 amps from the original mfr)

the 20 amp efests are panasonic 6 (i think) or 10 amp max discharge cells.
 

Alien Traveler

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But if I am using Efests in my Vamo with 1.8 ohm coil why should I bother about their max amperage? I'd rather look on the price and mahs. It's a bit out of real life - giving advises based only on subohming. I do not subohm, I do like Efests.

EDIT: event better - I can order them with free shipping when I order my dried mushrooms from Amazon (you know, $35, etc.).
 
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beckdg

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But if I am using Efests in my Vamo with 1.8 ohm coil why should I bother about their max amperage? I'd rather look on the price and mahs. It's a bit out of real life - giving advises based only on subohming. I do not subohm, I do like Efests.

amp ratings... if true... directly correlate within reason to internal impedance...
which then correlates to voltage drop under load...
which then correlates to how close to empty you can draw your batteries before the voltage goes below the set minimum of your device...
which then correlates to how long your vape will last on a single charge...

and also is a determining factor in the overall health of the cell and the likelyhood of it achieving and/or exceeding it's rated cycle life.

yes, these are exacerbated as you pull more amps from the cell, but they're still relevant at any output level.

now, of course, a 30 amp cell isn't going to make much of a difference at 7 watts. but a 10 amp cell should show improvements over a 6 amp cell with all other specs being equal.

but one thing to consider with the 6 amp cells. their operating voltage range can go down to 2.5V... so you lose the capacity advantage over the higher amp rated cells and you're again relying on a low impedance to get the most out of the cell... which isn't there...

so in your example, you may be better off with the higher mah cells. in your case, it would likely prove prudent to stick with panasonic cells that are likely in your efests. you may find they do or don't perform a little better since you may or may not get fresher cells by not having an extra step in the supply chain and you may get better cells as panasonic is putting their own name on the, so likely to have the better cells of the batch while selling ones that might have a higher impedence to rewrappers.

i dunno.

but you'll still be able to get a better price for the same cell if you shop around.
 
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Thrasher

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I would be using Panasonic 2900 pf in a vamo anyways. Why buy any superamp battery then? go for max runtime

And dollar for dollar hybrids end up cheaper because they have 2 to 3x the charge cycles. I have pf' here coming up on 2 years old still working perfect.

I think the b is 1000 charges if I remember right
 
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beckdg

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I would be using Panasonic 2900 pf in a vamo anyways. Why buy any superamp battery then? go for max runtime

And dollar for dollar hybrids end up cheaper because they have 2 to 3x the charge cycles. I have pf' here coming up on 2 years old still working perfect.

I think the b is 1000 charges if I remember right

same thing i ran in my vamo when i started out. not bad batteries at all.
 

Alien Traveler

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amp ratings... if true... directly correlate within reason to internal impedance...
Yes
which then correlates to voltage drop under load...
Does not matter for low wattage
which then correlates to how close to empty you can draw your batteries before the voltage goes below the set minimum of your device...
which then correlates to how long your vape will last on a single charge...
Are you talking about mahs? If yes, then yes.
and also is a determining factor in the overall health of the cell and the likelyhood of it achieving and/or exceeding it's rated cycle life.

yes, these are exacerbated as you pull more amps from the cell, but they're still relevant at any output level.

now, of course, a 30 amp cell isn't going to make much of a difference at 7 watts. but a 10 amp cell should show improvements over a 6 amp cell with all other specs being equal.
How so?
but one thing to consider with the 6 amp cells. their operating voltage range can go down to 2.5V... so you lose the capacity advantage over the higher amp rated cells and you're again relying on a low impedance to get the most out of the cell... which isn't there...

so in your example, you may be better off with the higher mah cells. in your case, it would likely prove prudent to stick with panasonic cells that are likely in your efests. you may find they do or don't perform a little better since you may or may not get fresher cells by not having an extra step in the supply chain and you may get better cells as panasonic is putting their own name on the, so likely to have the better cells of the batch while selling ones that might have a higher impedence to rewrappers.
But as I already said I'd rather order rewrapped panasonics (i.e. efests) from Amazon (with free shipping if I get them with my mushrooms) than order original panasonics with shipping costs.
i dunno.

but you'll still be able to get a better price for the same cell if you shop around.

Quite possible. I do not know.
 

Alien Traveler

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I would be using Panasonic 2900 pf in a vamo anyways. Why buy any superamp battery then? go for max runtime

And dollar for dollar hybrids end up cheaper because they have 2 to 3x the charge cycles. I have pf' here coming up on 2 years old still working perfect.

I think the b is 1000 charges if I remember right

Sorry, I do not believe it. As far as I know (I do not insist I know a lot) nobody guaranty more than 300 charges.
 

beckdg

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It's a bit out of real life - giving advises based only on subohming.

if i address this from both sides of the coin. then instead of reading the whole thing subjectively, you pick it apart piece by piece with only the narrow outlook of someone who only sees benefits under 15 watts. then you come up with these questions as you pick it apart piece by piece...

YesDoes not matter for low wattageAre you talking about mahs? If yes, then yes.How so?But as I already said I'd rather order rewrapped panasonics (i.e. efests) from Amazon (with free shipping if I get them with my mushrooms) than order original panasonics with shipping costs.


Quite possible. I do not know.

the OP is interested in 0.2 ohm vaping. this discourse is irrelevant to the thread topic. other than it's distracting and misleading considering the OP's intention.

i think you know more than you're letting on and you realize i'm correct. sorry i insinuated something about your favorite batteries. though, that doesn't make it any less true or change my stance. i'm standing my ground on this... and with good reason... and you know it.
 
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