Warning Efest 18650 Battery Venting at 14 Amps & Exploded.

Maverik_X · Aug 1, 2015

Just found this on Reddit may wanna be careful with these new in house efest batteries.
https://www.reddit.com/r/electronic...ger_efest_18650_battery_venting_at_14amp_and/

this just goes to show how bad they have become at over rating cells.

smacksy · Aug 2, 2015

Maverik_X said:
Just found this on Reddit may wanna be careful with these new in house efest batteries.
https://www.reddit.com/r/electronic...ger_efest_18650_battery_venting_at_14amp_and/

this just goes to show how bad they have become at over rating cells.

From what I understood from his broken English he was vaping a .25 ohm build that pulls about 17A/70w at 4.2v....but I don't believe this guy knows what he's talking about. I've been running the same batts in my XXIX mech with builds as low as .15 ohms that pull about 28A/117w at 4.2v without any issues at all. They don't get hot and in fact I have to chain vape for them even to get warm..just sayin

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NemesisVaper · Aug 2, 2015

smacksy said:
From what I understood from his broken English he was vaping a .25 ohm build that pulls about 17A/70w at 4.2v....but I don't believe this guy knows what he's talking about. I've been running the same batts in my XXIX mech with builds as low as .15 ohms that pull about 28A/117w at 4.2v without any issues at all. They don't get hot and in fact I have to chain vape for them even to get warm..just sayin

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You're using different cells. Thrones you pictured are rewrapped LGHE2. The ones that supposedly vented at low loads were the 2800mAh. Those are custom produced in China for efest.

Haadkoe · Aug 2, 2015

NemesisVaper said:
You're using different cells. Thrones you pictured are rewrapped LGHE2. The ones that supposedly vented at low loads were the 2800mAh. Those are custom produced in China for efest.

^^ this

smacksy · Aug 2, 2015

Haadkoe said:
^^ this

My bad. Re-wrapped or not they work great..about 6 mos old and still doing the job..safely! Lol

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NemesisVaper · Aug 2, 2015

smacksy said:
My bad. Re-wrapped or not they work great..about 6 mos old and still doing the job..safely! Lol

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They're good batteries, no doubt. If it were me I'd be annoyed that I could have bought the actual A grade version LG wrapper and all for less. Not everyone knows what's under the wrapper of each cell and if you need to buy batteries you get what you can.

Slurp812 · Aug 2, 2015

smacksy said:
.15 ohms that pull about 28A/117w at

Check the discharge curves. You'll be lucky to have ~3.6 volts under such a heavy load. Still a bit much. Be safe! Venting like that is crappy. The Efest 2500 mah batteries seem like total crap.

smacksy · Aug 2, 2015

Actually it's 3.7v underload with a fully charged 4.2v batt..my all copper BCV XXIX has a very low voltage drop on the mod itself.. In fact it's still the hardest hitting 18650 mech I've vaped to date ...well worth the $180 I paid for it two years ago now...but thx for the heads up..

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OBDave · Aug 2, 2015

Jim_MDP said:
I didn't realize Efest actually PRINTS the 35A continuous right on the battery.
I had assumed it would be fine print somewhere including the text "pulse rating".

Even worse, they print a claimed 80 a pulse on there...

fat fingered flubs courtesy dumb mobile phone

Whiskey · Aug 2, 2015

Glad I don't use this kind , thanks for the heads up

NemesisVaper · Aug 2, 2015

Slurp812 said:
Check the discharge curves. You'll be lucky to have ~3.6 volts under such a heavy load. Still a bit much. Be safe! Venting like that is crappy. The Efest 2500 mah batteries seem like total crap.

The 2500mAh are fine, they're HE2's, perform identical to the set of HE4 I've got. The 2800mAh were the ones in the video.

Hopefully efest are going to look at the batch these cells that vented came from there's obviously an issue. Seems like the vent holes may not be sealed well enough.

To be fair, the guy that made the video isn't the most reliable and knowledgeable of people. He's holding a mod with an already venting cell upside down with the venting positive pole area cupped in the palm of his hand while demonstrating. For some reason he also thinks that each and every cell should be fully tested, as in charged, discharged and charged again. Don't think he realises how much a battery would actually cost if they did such a lengthy test to every single one.

He's got a valid reason to be pissed off, don't get me wrong.

Mike H. · Aug 2, 2015

A mod shouldnt have any battery voltage drop at all actually...None of my mech mods are less than the battery voltage output at the 510...when you add an atty is when youll notice any drop in voltage..most all of mine are in the mid to high 3.8 v range with .5 ohm dual coil builds under load...If you are using one of those inline meter to test for voltage drop consider those meters have a resistor in them creating a loss in voltage as a resistor is a load on the battery and drops the voltage.

The 2500 efest, as noted are LG HE2 cells that have proven themselves as a reliable battery, if not abused of course...I dont care for the jack up in price either because of the name...I have one efest 2500 that i got with the purchase of a used mod and its been working great so far in anything ive used it in including single cell mech mods with even .4ohm builds.

smacksy · Aug 2, 2015

Mike H. said:
A mod shouldnt have any battery voltage drop at all actually...None of my mech mods are less than the battery voltage output at the 510...when you add an atty is when youll notice any drop in voltage..most all of mine are in the mid to high 3.8 v range with .5 ohm dual coil builds...If younare using one of those inline meter to test for voltage drop consider those meters have a resistor in them creating a loss in voltage as a resistor is a load on the battery and drops the voltage.

The 2500 efest as noted are LG HE2 cells that have proven themselves as a reliable battery, if not abused of course...I dont care for the jack up in price either because of the name...I have one efest 2500 that i got with the purchase of a used mod and its been working great so far in anything ive used it in including single cell mech mods with even .4ohm builds.

I disagree to a point..some mech mods have a big voltage drop at the 510..take into account the stainless Nemesis... using a seperate pin in the top cap causing a drop, and the stainless tube doesn't conduct near as good as copper..That's why my 18650 mech is all C101 copper, copper hybrid top cap, copper switch housing, copper contacts and copper button..all contributing to one of the hardest hitting single batt mechs I've ever had the pleasure to vape, let alone own..

Copper XXIX is on the far left with a .15 24g build in the Doge... using the Efest 35A/2500 mAh batt it hits great!..blows good clouds without even breaking a sweat..lol
Better than the stainless 18650 mechs I've owned in the past that were part of my learning curve, like the Nemesis... now I'm into high powered regulated box mods but I still vape my mechs as they still have that ol' zing.. Lol

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Mike H. · Aug 2, 2015

smacksy said:
I disagree to a point..some mech mods have a big voltage drop at the 510..take into account the stainless Nemesis... using a seperate pin in the top cap causing a drop, and the stainless tube doesn't conduct near as good as copper..That's why my 18650 mech is all C101 copper, copper hybrid top cap, copper switch housing, copper contacts and copper button..all contributing to one of the hardest hitting single batt mechs I've ever had the pleasure to vape, let alone own..

Copper XXIX is on the far left with a .15 24g build in the Doge... using the Efest 35A/2500 mAh batt it hits great!..blows good clouds without even breaking a sweat..lol
Better than the stainless 18650 mechs I've owned in the past that were part of my learning curve, like the Nemesis... now I'm into high powered regulated box mods but I still vape my mechs as they still have that ol' zing.. Lol

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Pretty brave using a 20 amp battery on a .15 ohm build..lol

All the mechs i have i saw no drop at the 510 at all...including an aluminum manhattan...I have 2 copper smpl's..a copper nemesis, a copper manhattan and an aluminum manhattan...Also a hammond G box with mosfet.

Ive since converted the nemesis into a hybrid with a kepler top cap, an all copper spring i made and a full copper firing pin on the button but, even when it was stock it showed no voltage drop for me personally with magnets added and the stock silver plated firing pins

I just traded a stainless nemesis..i wish i had checked it before hand...now im curious..lol

CurlyxCracker · Aug 2, 2015

smacksy said:
I disagree to a point..some mech mods have a big voltage drop at the 510..take into account the stainless Nemesis... using a seperate pin in the top cap causing a drop, and the stainless tube doesn't conduct near as good as copper..That's why my 18650 mech is all C101 copper, copper hybrid top cap, copper switch housing, copper contacts and copper button..all contributing to one of the hardest hitting single batt mechs I've ever had the pleasure to vape, let alone own..

Copper XXIX is on the far left with a .15 24g build in the Doge... using the Efest 35A/2500 mAh batt it hits great!..blows good clouds without even breaking a sweat..lol
Better than the stainless 18650 mechs I've owned in the past that were part of my learning curve, like the Nemesis... now I'm into high powered regulated box mods but I still vape my mechs as they still have that ol' zing.. Lol

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When we're looking at a one piece tube SS is absolutely fine. The mass of metal that is all one piece provides very minimal voltage drop. The contacts and the threading of button and top cap hold more of a problem with voltage drop. If the tube is one piece SS isn't necessarily worse than copper.

smacksy · Aug 2, 2015

Mike H. said:
Pretty brave using a 20 amp battery on a .15 ohm build..lol

All the mechs i have i saw no drop at the 510 at all...including an aluminum manhattan...I have 2 copper smpl's..a copper nemesis, a copper manhattan and an aluminum manhattan...Also a hammond G box with mosfet.

Ive since converted the nemesis into a hybrid with a kepler top cap, an all copper spring i made and a full copper firing pin on the button but, even when it was stock it showed no voltage drop for me personally with magnets added and the stock silver plated firing pins

I just traded a stainless nemesis..i wish i had checked it before hand...now im curious..lol

Not using a 20A..Its 35A and it must be close to specs ..my .15 ohm build pulls 28A at 4.2v and these Efest batts have been great for about 6 mos now..they don't get hot and I have to chain vape for them to even to get warm..
But I only have one 18650 mech I use these days, this copper BCV XXIX..
Its shown here with the copper Zenith...(pic is about 2 years old now)

If these batts were unsafe I wouldn't use them, especially with the low sub ohm builds I like.. Just sayin

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Mike H. · Aug 2, 2015

smacksy said:
Not using a 20A..Its 35A and it must be close to specs ..my .15 ohm build pulls 28A at 4.2v and these Efest batts have been great for about 6 mos now..they don't get hot and I have to chain vape for them to even to get warm..
But I only have one 18650 mech I use these days, this copper BCV XXIX..
Its shown here with the copper Zenith...(pic is about 2 years old now)

If these batts were unsafe I wouldn't use them, especially with the low sub ohm builds I like.. Just sayin

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If its an efest 2500 35 amp with a purple wrapper on it im sorry to disappoint you but it is not a 35 amp cell..its a 20 amp cell and youre pushing your luck big time using it at .15 ohms.

That battery is a rewrapped LG HE2 battery which is a 20 amp continuous amp rating..the 35 amp is a "burst" rating...you can buy the same cell for $5.00 instead paying 7 or 8 or more for it..just sayin...lol

Whiskey · Aug 2, 2015

All we can do is warn of risk, there is nothing we can do for some who do not heed those warnings, sad but true

NemesisVaper · Aug 2, 2015

smacksy said:
Not using a 20A..Its 35A and it must be close to specs ..my .15 ohm build pulls 28A at 4.2v and these Efest batts have been great for about 6 mos now..they don't get hot and I have to chain vape for them to even to get warm..
But I only have one 18650 mech I use these days, this copper BCV XXIX..
Its shown here with the copper Zenith...(pic is about 2 years old now)

If these batts were unsafe I wouldn't use them, especially with the low sub ohm builds I like.. Just sayin

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The efest isn't a 35A cell. If it's the 2500mAh it's an LG HE2 with a different wrapper on it.

If it's of another capacity, it's a China made unknown cell. If you're comfortable with that, that's cool. Ain't nobody got the right to say what you're doing is wrong. What we can do is provide you with the correct information, that efest don't. If you decide to carry on, that's fine too. As long as you know what to look out for.

Be under no illusion, you do not have any 35A 18650 in your possession. They're like unicorns, fairies and God, they don't exist. It's not a pulse rating either. LG don't rate their cells for pulse.

There needs to be a sticky thread here informing people of the common rewrapped cells and their actual content and amp ratings.

smacksy · Aug 2, 2015

Mike H. said:
If its an efest 2500 35 amp with a purple wrapper on it im sorry to disappoint you but it is not a 35 amp cell..its a 20 amp cell and youre pushing your luck big time using it

Dude I'm not stupid.. I don't base my decision to use them by reading on some forum but rather how they perform in real life.. They have been great for the last 6mos vaping them everyday..They don't get hot, they last all day on a single charge and there is no need to worry...thx anyway for the thought..

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Mike H. · Aug 2, 2015

smacksy said:
Dude I'm not stupid.. I don't base my decision to use them by reading on some forum but rather how they perform in real life.. They have been great for the last 6mos vaping them everyday..They don't get hot, they last all day on a single charge and there is no need to worry...thx anyway for the thought..

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To each there own..glad its been ok for you.

BoomStick · Aug 2, 2015

I see no reason to buy a rewrapped, Japanese made, bin b or c battery when you can buy an authentic Japanese bin a battery. I also see no reason to buy any high drain lithium battery made in china. Just my opinion.

Kemosabe · Aug 5, 2015

BoomStick said:
I see no reason to buy a rewrapped, Japanese made, bin b or c battery when you can buy an authentic Japanese bin a battery. I also see no reason to buy any high drain lithium battery made in china. Just my opinion.

so i guess you wouldnt want to buy a samsung tv inside of a dynex box for almost twice the price? sheesh. people these days LOL

Jon@LiionWholesale · Aug 7, 2015

That battery was definitely a dud, or it was mistreated somehow. The guy did not seem very knowledgeable at all.

I did a lot of testing with the 2800mAh and it definitely wouldn't vent at 14A. As I mentioned in the other post, performance for me was very similar to the LG HG2 to the point that I actually suspect it might be a rewrapped HG2 or a copy of the HG2. The HG2 gets closer to 2800-2900mAh when pushed at high current so that might be the reason for the rating.

JColt · Aug 9, 2015

Mine work well. Granted I don't push them to limits though.

goa_2000 · Sep 24, 2016

Ok So this is gonna be short
DJLSB is one of the BEST reviewers with real knowledge in electronics, he does disassembly , has a battery amperage monitor etc, if he is not perfect in English maybe we should see you guys in his native language. Yet his English has nothing to do with the topic.
1 . EFESTs ARE whether you want to admit it or not the most documented exploding batteries so far, (hapenned to vapingHeathen recently 2016)
2. Because your batteries did not explode it does not mean all batches are safe.
3. Because you had yours for 6 months and are too cheap to buy safer batteries which are a dollar or two more expensive and mock people that tell you that you need to be careful because those batteries are prone to failure and are documented just makes u an AS$$$E.

Whiskey · Sep 24, 2016

Date of prior post Aug 9th

goa_2000 · Sep 24, 2016

Whiskey said:
Date of prior post Aug 9th

I know, jost wanted to rub their nose in it,
Now its just more obvious how dumb people can act when someone WARNS them

BoomStick · Sep 25, 2016

So your first post is reviving a year old thread to talk shit?

goa_2000 · Sep 25, 2016

Actualy its called updating information, Is your belief actualy leaving this thread without updating information regarding the efest 18650? Especialy in this specific battery safety issue thread? Do you disagree with my coments all of them are factual and those people ignorantly defended efests...yet my update is the issue, those people should feel responsible even for a single person that read this thread got the efests and endagered himself and others...based on their ignorant comments

marco67 · Sep 26, 2016

Why wasn't the thread closed?..

BoomStick · Sep 26, 2016

Factual? Haha. What a joke. Your post was full of opinions and name calling. I can do that too. You're a fucking douchebag. Pathetic.

Warning Efest 18650 Battery Venting at 14 Amps & Exploded.

Maverik_X

Deez Nutz

smacksy

NemesisVaper

Haadkoe

smacksy

NemesisVaper

Slurp812

smacksy

OBDave

Whiskey

NemesisVaper

Mike H.

smacksy

Mike H.

CurlyxCracker

smacksy

Mike H.

Whiskey

NemesisVaper

smacksy

Mike H.

BoomStick

Kemosabe

Jon@LiionWholesale

JColt

goa_2000

Whiskey

goa_2000

BoomStick

goa_2000

marco67

BoomStick

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