Purple efest 18650 battery warning

[anumber1]

How about a link to this test as I have searched and can't find it?
"Sony VTC5 30A discharge test posted today"

http://www.e-cigarette-forum.com/forum/batteries-chargers/592339-comparison-vtc4-vtc5-lg-icr18650he2-samsung-inr18650-25r.html

Here ya go

 

[Strangebrew]

Keep in mind that the 18350 AW IMR batteries only have a 6 amp continuous discharge rating. 0.8 ohms is the absolute lowest you should go with this battery, and battery life is going to suck.

If you are going to use sub-ohm coil builds, you really should be using only 18650 batteries. The lone exception might be the AW 18490 IMR 1100mah 16.8 amp battery (button top).

Please always vape safe.

Thank you for this post.

 

[SintheticKarma]

Whoops

 

[pnyc]

At least one of the batteries being tested came from an official Efest dealer Akkuteile.de in Germany so I don't think it is a counterfeit.

Efestbattery Notice


https://translate.google.com/transl...w.dampfakkus.de/akkutest.php?id=531&sandbox=1

DE: This battery is never loaded up to 20A continuous!
EN: This battery is no way Capable of a 20A continuous discharge!

Pattern obtained simultaneously from Vapor-Freak.de and Akkuteile.de.
Ooops, Sorry, I've poorly coordinated)

Shop @ Akkuteile.de
Shop @ Vapor-Freak.de

This sounds more like a counterfit than an efest issue. I have been using efest batteries for a long time without issues

 

[regal55]

I know a real purple efest is a beast for longevity, its the only one I've found that lasts 16 hours at work, the Panasonics I own give out in about 10 hours. So these counter feits are a real bummer fiving efest a luck of the draw now, or is this a faily isolated incident. Where can you buy them from a etailer who gets their batteries directly from efest?

 

[oplholik]

I know that RTD Vapor is an authorized AW dealer, and if I wanted an efest battery, I would trust RTD for getting a good one.

Batteries - RTD vapor

 

[bilboda]

I had a short Q and A with an Efest rep who insists their 3100 mah is made by their "parent company". She says that is true for all of their purple batteries. Maybe so, as there are cell mfr's in China and maybe they are licensed to mfr for other companies, I just don't know...

 

[Baditude]

I had a short Q and A with an Efest rep who insists their 3100 mah is made by their "parent company". She says that is true for all of their purple batteries. Maybe so, as there are cell mfr's in China and maybe they are licensed to mfr for other companies, I just don't know...

As I have said in the past, Efest has been known to "stretch the truth" (my words) and/or over-rate their battery specs. If the so-called parent company makes all of their purple batteries, how do you explain if you tear the wrappers off of both a purple Efest 2100 mah 30 amp battery and a Sony VTC4 2100 mah 30 amp battery, you'll find exactly the same battery cell? Re-wrapping another manufacturer's cell is not making their own battery. At least half of the purple Efest battery models are allegedly re-wrapped batteries from other manufacturers. Sony VTC batteries were made in a facility in Japan until the nuclear accident, and now they are being made in a new facility in the Phillipines.

 

[DaveP]

A quick lookup of Efest leads to Shenzhen Fest Technology Co., Ltd.

If you click "Trademarks and Patents" on the Shenzhen page below, Efest is listed as their trademark name, FWIW. As to who makes their products, that's not divulged.

Company Overview - Shenzhen Fest Technology Co., Ltd.

 

[Maxcom]

This sounds more like a counterfit than an efest issue. I have been using efest batteries for a long time without issues

Same here, no problems

 

[sk4477]

I thought i'd leave a short comment here: I am owner and the (remaining) operator behind "dampfakkus.de" which has been quoted a couple of times in this thread.

Thanks for your interest in my site, btw

Now, if there any questions about my test results, how the tests are done or where the samples were acquired from, do feel free to contact me. Either via the rudimentary contact form on the site itself, or here on ECF, whatever you prefer. Always happy to help & talk batteries

Cheers,
Stephan

 

[DaveP]

I thought i'd leave a short comment here: I am owner and the (remaining) operator behind "dampfakkus.de" which has been quoted a couple of times in this thread.

Thanks for your interest in my site, btw

Now, if there any questions about my test results, how the tests are done or where the samples were acquired from, do feel free to contact me. Either via the rudimentary contact form on the site itself, or here on ECF, whatever you prefer. Always happy to help & talk batteries

Cheers,
Stephan

Stephan, I think everyone is interested to know if the batteries in question were "real and verified" Efest purple 2500mah 35 amp batteries. I'm assuming they were since you most likely obtained and tested them from a trusted source. I have seen quotes on other forums that stated Efest had changed the 35 amp rating to a "pulse rating" instead of a max or continuous rating. Most vapers would never approach the 35A rating, since our VV and VW mods seldom go beyond 4 or 5 amps, but some mech sub ohm and DNA30 users might get close.

I have a couple of the purple Efest 35A batteries myself and use them in regulated VV/VW mods. They perform in a similar manner in use and charging to my AW red 18650 2000mah and the black and silver Efest 18650 2250mah batts.

 

[qorax]

All I know is that my 3100mAh Purples work perfectly in my WAE-II and rather offer the longest mileage. Way more than my VTC5s. And btw, anything which is not an IMR doesn't work on the WAE-II. Non-IMRs flicker the battery status bar within a few draws ~ and eventually show depleted.

My Panny NCR18650BA doesn't work with the above mod. But this purple works like a champ and gives me an entire day with this power hungry DNA30 device. As such I am pretty elated with my Purple Efest 3100mAh batteries ~ I just love them.

 

[sk4477]

Hi Dave,

the Efest Purple IMR 18650-2500mAh "35A" samples came from my trusted main supplier for anything LiIon, a german battery vendor called Akkuteile. Among us german vapers this is probably one of the most popular battery vendors. Now, I am pretty sure they buy straight from Efest, that's what they told me at least, but beyond that, there is no way for me to prove it. The only way for me to 100% guarantee authenticity of the test samples would be if I were to myself purchase directly from Efest, i try to avoid that,as much as possible. The samples were supplied to me free of charge for review by Akkuteile.

There seems to be a consensus that this particular Efest Purple "35A" is infact a rewrapped LG HE2. I tend to agree - and my test results for the Efest Purple "35A" match that as well. LGs HE2 is rated for a maximum continuous discharge of 20A. In addition to that, I recall seeing 35A listed for pulses up to 75sec in duration in LGs spec sheet (if i recall it right, i dont have it sitting in front of me tonite).

Oddly enough, this all lines up, Talking about lining up perfectly, so do the actual discharge curves even up to 20A.

So, yes, I agree: I think the 35A printed on Efest 18650-2500 "35A" is infact the pulse rating LG specified for the LG HE2.

The LG HE2 is a pretty decent battery, actually. My only gripe with this particular Efest is: its max continuous discharge rate is specified at 20A, not 35A. 35A is a pulse rate. (With up to 75sec still way more than we vapers are likely to need, but pulse nontheless.. I am a bit pedantic about stuff like that.)

I've been criticising Efest heavily in the last couple of weeks (not so much on dampfakkus, as I keep commentary to one or two short sentences there) not because their batteries are bad. No, I criticise them for "stretching the truth" in their data sheets or on the actual label itself. These Efest Purple cells aren't bad at all when operated within their true specs. Efest managed to source a decent selection of cells to stick their purple shrinkwrap on. Sony VTC4s for the 2100mAh, LG HE2 for the 2500mAh, the MNKE for 26650 "32/64A", even the highly debated 3100mah "20A" aka Panasonic BE is a good cell even 10A, just not at 20A. 18350 and 18500 tested well as well (unfortunately i never managed to find who really produces those)

.. and then we hope like hell Efest won't all of a sudden switch suppliers and start shipping out something completely different instead. Thats anothe rhuge worry i got with Efest.

 

[Baditude]

I thought i'd leave a short comment here: I am owner and the (remaining) operator behind "dampfakkus.de" which has been quoted a couple of times in this thread.

Thanks for your interest in my site, btw

Now, if there any questions about my test results, how the tests are done or where the samples were acquired from, do feel free to contact me. Either via the rudimentary contact form on the site itself, or here on ECF, whatever you prefer. Always happy to help & talk batteries

Cheers,
Stephan

Hi, Stephan, and thanks for introducing yourself and offering your knowledge to us. In no way am I bragging, but I'm sort of known as the "battery expert" and safety guy here on ECF. I share your concern for the way Efest markets/advertises their batteries.

Could you look over my blog, Purple Efest Batteries Not As Advertised and make sure there are no errors?

I also have two other blogs on batteries. Any commentary, pro or con, would be appreciated:

Battery Basics for Mods: IMR or ICR?

Deeper Understanding of Mod Batteries parts I & II

One last thing that I've always wondered about but could never find an answer, is where does AW get their IMR batteries? It seems to be common knowledge that AW buys ICR batteries from Japan and uses only the best for the AW label. The ICR's say, "Made in China, IC and cell made in Japan."

However, the IMR's only say, "Made in China." I don't know of any Japanese manufacturers who make IMR batteries in 14500, 18350, or 18490 size. Could AW batteries actually be manufactured in China, and by whom?

 

[zoiDman]

I just receive an Efest 18650 2500mah from Fasttech. It came Free with a Hana DNA Clone.

If I cut the Wrapper Off it, should there be any Markings which will Identify the Original OEM?

 

[DaveP]

Thanks for the comments and clarifications, sk4477! I hope we see you around ECF on a regular basis.

 

[sk4477]

@Baditude,

Good stuff you've written there, I like your posts alot!

One small correction if i may re: Dampfakkus. I don't have a "lab", I am just a nerd with some inexpensive hobby equipment in the basement. I try to do my best, but if ppl are looking for professional lab results, HKJ vom Lygte-Info is the place to go ;-)

AWs red IMR, heh, I wish.. I don't have the first clue either. I was never able to find cells that matched AW performance characteristics. There are "better" (i.e. for whatever specific need one is looking for) cells available on todays market than AW IMR in almost all sizes, but I never found cells that were "the same". ( Does that make sense or am I nattering incomprehensibly?)

Plus with AW you get consistency and reliability..

 

[oplholik]

@Baditude,

Good stuff you've written there, I like your posts alot!

One small correction if i may re: Dampfakkus. I don't have a "lab", I am just a nerd with some inexpensive hobby equipment in the basement. I try to do my best, but if ppl are looking for professional lab results, HKJ vom Lygte-Info is the place to go ;-)

AWs red IMR, heh, I wish.. I don't have the first clue either. I was never able to find cells that matched AW performance characteristics. There are "better" (i.e. for whatever specific need one is looking for) cells available on todays market than AW IMR in almost all sizes, but I never found cells that were "the same". ( Does that make sense or am I nattering incomprehensibly?)

Plus with AW you get consistency and reliability..

That's what I like to hear.

 

[pnyc]

Hi Stephan,

Thanks for your input. This one sentence is good enough for me to hang on to my AW batteries:

"Plus with AW you get consistency and reliability.. "

@Baditude,

Good stuff you've written there, I like your posts alot!

One small correction if i may re: Dampfakkus. I don't have a "lab", I am just a nerd with some inexpensive hobby equipment in the basement. I try to do my best, but if ppl are looking for professional lab results, HKJ vom Lygte-Info is the place to go ;-)

AWs red IMR, heh, I wish.. I don't have the first clue either. I was never able to find cells that matched AW performance characteristics. There are "better" (i.e. for whatever specific need one is looking for) cells available on todays market than AW IMR in almost all sizes, but I never found cells that were "the same". ( Does that make sense or am I nattering incomprehensibly?)

Plus with AW you get consistency and reliability..