"MAX" devices Batteries discussion

[VAPNJ350]

DW...If your refering to the batteries in the link you posted I honestly couldn't tell you. I've tried getting a straight answer on that exact question myself to no avail. The cathode material is what I mainly look at when purchasing a IMR cell. The Panasonic CGR uses a 3rd material along with Lithium and Manganese in the cathode construction which is what makes it a hybrid type cell and gives it the ability to exchange the internal energy extremely fast and sustain high stable discharge rates.

 

[Superchip92]

I saw this post on the CCV thread. It may shed some light on the efest batteries.

OK, I'm going to get allot of flack from this post but oh well, Seems the Efest 2250 is actually a re-wrapped Panny CGR18650ch, discovered as trying it in my ZMAX, it fit inside tube fine but the bottom cap was to tight to fit over the wrapper at bottom, so slit it with utility knife only to fine out it was actually a panny underneath, I know what your thinking are all efests others just re-wrapped, if they are then they found the best battery's on the planet to rewrap, AW's are not even in same league as there efest counterparts get 10 more hours outta an efest 2000 then AW 2000, actually these efest 2000 outperform the panny's, now how they pulled that off I don't know nor do I really care, got 4 extra hours from 2000 efest as did from 2250 panny on my ZMAX. I know other vendors say why did you tell everyone about this, well it would come out sooner or later, other vendors they can just tell there problems to Jesus I hear he's listening now. Now don't get me wrong AW's are great battery's just not the top of the line anymore.

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[VAPNJ350]

I saw this post on the CCV thread. It may shed some light on the efest batteries.

That doesn't apply here. Those are actual Panasonic CGR's re-rapped at the E'fest factory as per requested by a lot of the resalers of E'fest's. I'm refering to Genuine E'fest batteries produced by E'fest. The 18650 2000maH, 18350 800maH, 18500, and 14650's.

 

[jackbox]

That doesn't apply here. Those are actual Panasonic CGR's re-rapped at the E'fest factory as per requested by a lot of the resalers of E'fest's. I'm refering to Genuine E'fest batteries produced by E'fest. The 18650 2000maH, 18350 800maH, 18500, and 14650's.

@VAPNJ350 - Can you give a link for eFest's official website please? I'd like to take a look at it.

 

[ckone180]

I read that too superchip, but I do not think Panasonic makes any other size yet. I may be wrong. Clearly EFest does relabel some at least and resales them.

 

[ManniGfaltig]

Sorry, I just got aware of this thread. Besides me being German I trust our independent battery test side way more than your sources (the slides are labeled by ShenZhen E-Young Technology Co. ltd). Anyone can check out this graph and make his own decision: AkkuDB
You can see graphs for different Ampere values by changing the last value in the link (a=x) - 2,3 and 5 are valid values.

Of course it has to be said that battery quality may differ from battery to battery but as my own AW 18350 (2 pieces) have been tested here and I know that they were not brand new like most other batteries tested, and still outperform the other batteries, I made my own decision which tends to say that AW and the VMax batteries are pretty good, the EFest flat top battery is also quite good but fails way earlier, especially at higher ampere values which would apply to the typical ZMax usage (well I would use it with one 18650 anyways - I didn't like the VMax PWM).

Actually Dirk thats far from accurate, Heres the test data..and my personal test data at multiple discharge rates show the E'fest to not only out power the AW in higher amp situations but out last it by 30-45% depending on discharge rate ofcourse. The E'fest battery is one heck of a cell, the 18350 800maH, 18650 2000maH, 18500, and the 14650. I've got word that their is a knock off company out there obviously trying to capitalize on the "genuine E'fest recent testing and are trying to sell knock off labeled E'fest so make sure you purchase your batteries from a reputable dealer, this also happened with the AW brand from a European company trying to capitalize on AW's success. E'fest are all I use now, all my AW's are now my backups which I never thought would happen....I do also use the Panasonic CGR hybrid 18650, that's just the best cell technology I've yet to see in a 18650 IMR battery bar none. Hope this helps.

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[r77r7r]

...............

 

[dwcraig1]

If nothing else I now have my answer to "are the Vmax batteries IMR and protected", but other than that I am confused about Efest quality as I have been following Vmax owners thread. I have the nipple tops in my SS but it has not seen more than an hour of use so?

 

[jackbox]

@VAPNJ350 - Did you get an answer on to which ones are the legit ones? The ones with dimples or the ones without dimples? Or are they both legit? I am awaiting your answer before I order some.

 

[ManniGfaltig]

The ones without dimple performed fine in the battery test that was organized in a german forum whereas the ones with dimple were really bad - see link in my post above (FlatTop - without dimple / Button Top with dimple).

 

[skipdashu]

Jan, et.al.,

While I have only done my discharge tests @1A to 3.0v from 4.22v I have quite a variance in my Efest IMR 18350s. The 4 I ordered directly from BIO prior to 5/25/12 all tested out fairly well and when retested after >10 usage cycles are still OK.

All the ones (6) I purchased after that date (from two sources, one US and one China) get lower capacity numbers than the earlier ones. Particularly when re-tested after 10+ usage cycles.

None of mine have the indent in the top.

I've got some AWs, Efests and generics from ENS (Utah) that now have in excess of 25 usage cycles on them in VMax and Varistacks so I'm running some tests on them now but so far the AWs have a higher capacity than the others at this stage of their life.

Remember this is ONLY the 18350s I'm talking about here and they've all been used in stacked pairs in buck mods where they don't see the current draw that a boost mod might require.

Skip

 

[jackbox]

Anyone have an answer about the dimple, no dimple issue?

 

[skipdashu]

Anyone have an answer about the dimple, no dimple issue?

If the question is about the dimple telling you if they are the good ones or bad ones...
Based on above 10 batts the good/bad doesn't seem to have anything to do with it since these 10 are all "dimpless".
Seems to me to be production date oriented. I'll see if I can get some more straight from BIO and check those.

If the question is about being 'real' eFests or not... haven't seen a thing on that.

khap kuhn, Skip

 

[jackbox]

I contacted the manufacturer of the eFest batteries and after sending them photos of the dimple and no dimple version here is what they said about it.

"The dimple batteries is the old version,now we did not sell it. We only produce the no dimple batteries now,because the connection will be better."

So people should only be receiving the no dimple version now.

 

[AnsonJames]

Sorry, I just got aware of this thread. Besides me being German I trust our independent battery test side way more than your sources (the slides are labeled by ShenZhen E-Young Technology Co. ltd). Anyone can check out this graph and make his own decision: AkkuDB
You can see graphs for different Ampere values by changing the last value in the link (a=x) - 2,3 and 5 are valid values.

Of course it has to be said that battery quality may differ from battery to battery but as my own AW 18350 (2 pieces) have been tested here and I know that they were not brand new like most other batteries tested, and still outperform the other batteries, I made my own decision which tends to say that AW and the VMax batteries are pretty good, the EFest flat top battery is also quite good but fails way earlier, especially at higher ampere values which would apply to the typical ZMax usage (well I would use it with one 18650 anyways - I didn't like the VMax PWM).

I'll stick to my AW's.

Genuine AW's are consistent to the hilt, the Efest's aren't

Tests done on the behest of the manufacturer don't tend to be as "independent" as they should be.
In the end it becomes one person's word against another, I'm more inclined to go with the German site test results as they have no financial incentive in this matter.

 

[Algerhugz]

Panasonic CGR18650CH Would this be a good battery for the Zmax and the trustfire multipurpose charger that AAV will let you add to your order for 10 bux will that charger work with that battery and is it a good charger?

 

[skipdashu]

Yup, have used them together myself. I've had reasonably good luck with that charger and VERY good results with that battery. Using it in my ZMax now.

 

[skipdashu]

posted THIS in wrong place, sorry was replying.

 

[Cjax]

For those that own the Zmax I have a 2 part "noob" question concerning it's batteries:

1. Are all 18650 batts the same size?...
2. Is it written anywhere the inside dimension of the tube to know just how big a battery will fit in single 18650 configuration? and...
3. Will, say, a larger batt like the 3000mah 18650 aw battery work with the extension cap, and is this still safe?

I'll be making this my first mod in about a month and want to make sure i get the biggest aw batt i can for lifespan's sake. I, unfortunately don't have the luxury of having any spares lying around to test out. It's been all ego batt's my first year and I'm ready to get my big boy vape on, lol.

Also if the answer to part 1 is yes, obviously 2 and 3 are moot so feel free to tell me ....!

 

[Cjax]

Ha ha, won't let me edit. I meant 1,2,3, not 1,1,2!