Efest test results

[mgmrick]

Seems efest batteries are not all that bad...

Best batteries for cloud chasers/high current: Sony VTC4 vs Efest 38A – Liion Wholesale Batteries

 

[Jimi D.]

That's great to know man. Good to see tests on them. This should shut up the internet battery geniuses.

 

[Thrasher]

That's great to know man. Good to see tests on them. This should shut up the internet battery geniuses.

Until efest can spit out an actual data sheet, nope still cant trust thats really a 38 amp cell and thats the question. Noone disputes the quality, since the test kind of forgot to go that high and validate the claim, no one knows

 

[mgmrick]

It should be noted that the company that ran these tests sells alot more than just efest batteries.

Believe what you want...I don't see their tests as hype rather just a test.

 

[Thrasher]

Your missing the point the other companies arent afraid of releasing the manufacturing data sheet to the public.

The only batteries that refuse to release factory data are the ones making false claims

If it is what it is ,,, what do they have to hide?


So no believe what you want

 

[mgmrick]

Excuse me... this was not efest test is was an independent test by an independent reseller of numerous brands of batteries. I prefer to believe independent test than info provided by a maker on something like this

 

[Thrasher]

Efest claims thats a 60 amp pulse battery
And compared to everything else you dont think thats a bit high?
Just askin, real question

No offense meant , enjoy them man

 

[Jimi D.]

I wouldn't want to give the manufacturer info to the public. The competition would steal it in a heartbeat.

 

[Mooch]

That 30A chart has problems. They did their shaking thing just as the 38A Efest cell started to plunge but didn't shake the other cells at the same time or voltage point. In fact, not at all after they shook the Efest cell. The 38A Efest would have hit the cutoff at about 1.7Ah as its voltage just plummeted versus the other cells. The 38A Efest capacity is not hugely worse than the others but it's significantly below the rating they're claiming.

And the 20A chart has problems too. Unless they're doing their shaking thing at the same time or voltage point for each cell then the results can't be compared. Why not just let the cells discharge without shaking so there is a true comparison between them?

The other thing that caught my eye is the higher temperature wrapper. If the cell has a higher temp wrapper then the cell's internal resistance is too high for that much current and you're cooking the cell. Heck, it's being cooked wayyyyy before that point but I know most users prefer max power/current over long cell life.

You can call just about any decent cell a 38A cell. Voltage under load and capacity measurements are good. But unless you know how hot it gets and how many cycles you can get when discharging at those rates, calling it a 38A cell means nothing. What good is a cell that can put out 38A amps but only lasts 50 cycles?

 

[Mooch]

I wouldn't want to give the manufacturer info to the public. The competition would steal it in a heartbeat.

The datasheet is what the manufacturer does give to the public though. It contains no information on the construction of the cell or what's inside it. It just lists the cell's specifications and, hopefully, the testing setup they used to set those specs. It provides no information to other cell manufacturers. Go to any web site for the established cell manufacturers and you can download the datasheet for any of their cells.

 

[Mooch]

Excuse me... this was not efest test is was an independent test by an independent reseller of numerous brands of batteries. I prefer to believe independent test than info provided by a maker on something like this

The biggest problem, in my eyes, is that the independent resellers often don't know how to run good tests. Their methodology is often random or uncontrolled, they ignore certain important variables, and they make statements about the cells that the tests don't support. Not an indictment against the resellers, just saying that there is a lot involved in doing good tests.

The manufacturers however sell millions of cells to large corporations that would most certainly hold them accountable for any discrepancies in the datasheet.

The biggest problem for us is that no manufacturer tests to the levels the cells are (ab)used at. They think we're insane. That leaves us having to trust third-party testing and that can be problematic. Most resellers don't have the time or equipment to do good testing which is completely understandable, they need to run a business. But it often leaves us with questionable test results.

If the results look good to anyone though, and the cells are working well and safely for that person, then run with it!

 

[mgmrick]

All good points. I don't know anything about the company that ran these tests. But a quick look at their site and it looks like they sell many brands of batteries used in the vaping industry. Not sure why they would favor one over the other and they did rank both brands about even that they ran the tests on

 

[beckdg]

Looks to be identical batteries.

No markings on the cell under the sheathing means either they ordered them that way or they added a step to remove ink before rewrapping.

Conclusion of article suggests same conclusion I get from the data. Efest are as good as the battery they used to be... battery they used to be is now commonly counterfeit... buy your authentics from a reputable dealer... if that dealer happens to be out... and you're willing... feel free to pay a little more for a wrapper in a pretty color with inflated specs... but know performance is nearly or actually identical despite the color, claims and price difference.

Tapatyped

 

[beckdg]

All good points. I don't know anything about the company that ran these tests. But a quick look at their site and it looks like they sell many brands of batteries used in the vaping industry. Not sure why they would favor one over the other and they did rank both brands about even that they ran the tests on

Doesn't look like favoritism.

Looks like protecting sales.

Tapatyped

 

[Mooch]

All good points. I don't know anything about the company that ran these tests. But a quick look at their site and it looks like they sell many brands of batteries used in the vaping industry. Not sure why they would favor one over the other and they did rank both brands about even that they ran the tests on

The cynical New Yorker inside me says kickbacks. But that's going to extremes and I know that the vast majority of resellers are just trying to do their best to educate everyone and make an honest living.

Good point about the cells all testing fairly close. Would love to know their temperatures though. If one ended up at 100C and the others at 70C I would surely avoid the hotter cell.

 

[beckdg]

That's great to know man. Good to see tests on them. This should shut up the internet battery geniuses.

Not a chance, buddy.

Tapatyped

 

[Thrasher]

Yea, noone has ever said the efest is a bad cell, as you see it is pretty even.

The argument has been if its as superior as you claim why no data sheet
And
Since its even in performance why would anyone be willing to pay more for them

Thats all

no one is saying its a horrible cell that doesnt even work we just want people to realize its not the vasrly superior cell they claim it is and be careful with the way the rated it. As in just dont take the rating for granted.

 

[beckdg]

Yea, noone has ever said the efest is a bad cell, as you see it is pretty even.

The argument has been if its as superior as you claim why no data sheet
And
Since its even in performance why would anyone be willing to pay more for them

Thats all

no one is saying its a horrible cell that doesnt even work we just want people to realize its not the vasrly superior cell they claim it is and be careful with the way the rated it. As in just dont take the rating for granted.

And we know most people see 2 numbers, pick the bigger one and believe it.

Tapatyped

 

[Rocketpunk]

I can't speak for safety specs and I'm sure more than one Chinese company has made false claims. But our local vape shop carries the purple Efest 2500 mah "35" amp limit batteries, and it's all we use. I know some people may be shocked at that (looking at you, Baditude, buddy ol' pal! ;-) ), but everyone at work uses either drippers or sub-ohm tanks on mechs and regulated box mods and none of us have ever had even so much as a scare. And some co-workers build down as low as .2 ohms. Then again, they are all exceedingly familiar with safe battery practices, so that may be a part of us not having any kind of scare as far as Efests go. Also, something to take note of: a lot of B&Ms have a hard time getting 18650 batteries past customs in China. So much hate for batteries that have performed 100% just fine for me, my coworkers, and everyone else I know of who uses them.

 

[beckdg]

I can't speak for safety specs and I'm sure more than one Chinese company has made false claims. But our local vape shop carries the purple Efest 2500 mah "35" amp limit batteries, and it's all we use. I know some people may be shocked at that (looking at you, Baditude, buddy ol' pal! ;-) ), but everyone at work uses either drippers or sub-ohm tanks on mechs and regulated box mods and none of us have ever had even so much as a scare. And some co-workers build down as low as .2 ohms. Then again, they are all exceedingly familiar with safe battery practices, so that may be a part of us not having any kind of scare as far as Efests go. Also, something to take note of: a lot of B&Ms have a hard time getting 18650 batteries past customs in China. So much hate for batteries that have performed 100% just fine for me, my coworkers, and everyone else I know of who uses them.

I use he2's @ as low as .18 also. One with an efest wrapper should handle .2 all day, every day.

But so does a Samsung 25R for $6.

Tapatyped