Thank you very much for HKJ’s test.
Battery consistency and power deficiency, hope to be improved in the future
We are doing this.
16340 battery with PCB, we also hope to come out as soon as possible.
At present we can do better 16340, but some battery factories have huge MOQ 
The 16340 market is much smaller than the 18350 market.
Hope the future will be good 
And Thank users for your support of vapcell
I concur with DavidEF, the 5A discharge curve still looks sort of healthy. However, there is a large difference in internal resistance between the tested specimens. Iffy stuff which speaks bad with regards to product consistency. I also wonder about the button top spot welding quality.
Thanks,
We will find ways to improve product consistency
Thanks HKJ!
Looks like good batteries, bought a few for my olight batons, they should be great
I got this in an eBay email, assume US only for $5 off:
Code: YUSRAOMY7HW9FPBM. Ends Jun 29, 2019. T&Cs apply.*
Wit this link for qty 2 of these Vapcell 16340's: https://www.ebay.com/i/233242085587?ul_noapp=true
If the code works, it's a pair for $5 shipped - great deal. Let me know if it works. I've bought from the eBay seller before - good as long as you know what you are buying.
I copied the code and pasted it,it did not work for me.
Today should be the last day, but guess it's linked to an eBay account somehow? dunno...
I just tested the Acebeam TK16 Osram version with these three cells. The new Vapcell 800mah is clearly the king of 16340.
Vapcell 800mah
Output: 1,184 lumens
Tested capacity: 781, 782, 791, 757 mah
Acebeam 550mah
Outpu: 1,190 lumens
Tested capacity: 617 mah
Efest 700mah Red wrapper
Output: 1,112 lumens
Tested capacity: 685 mah
Acebeam for the win, deception free capacity claims. Top lumens, too.
Just to add a quick test of a cell that was bought “in the wild” (nkon.nl) a few weeks ago. I think it is genuine. It performs good in my Acebeam TK16, but are not as brilliant as the samples “provided by Vapcell for review”. I added the included battery of the light for a comparision. They were charged in a Graupner Ultramat 14 plus to 4.2 V, 200 mA and discharged with a Keithley Source Meter 2601 at 3 A to 3 V.
How did you obtain the “provided by Vapcell for review” and can you show comparisons? I also bought the Vapcell 800mah and it seems to match up with HKJ’s review. Also did a bunch of output test and I can comfortably say they are the best high capacity 16340 in existence at the moment.
I was referring to the original test, where the cells were provided, and those work better than the ones you might get when buying them. That goes in line with other overservations in this thread, that mention some inconsistencies. And while I would say, they are even some of the best high drain 16340 (this format seems to be quite rare anyway, so in my case they were the only option even), I guess it is fair to criticise the “optimistic” rating and the inconsistencies.
Ok, but I’m not sure how you compared your cells with HKJ’s results. I would like to see the “differences” you are seeing because for me, at least capacity wise, it is not any worst than HKJ’s test. I’m very happy with the cell.
Reality molds to your wishes, your beliefs so, are you believing right?
I am also sure that at least some or many people actually have no black sheeps, i.e. good cells overall.
Yes, fair it is to criticise the inconsistencies and the (to some point) optimistic rating. The former mostly disqualifies the product for in series operation or battery pack assembly, the latter is the shame of an industry who has been living on deceptive, overrated best case numbers for too long. A battery is a lot more than a freakin' number, most people needs to understand this. 
Just compared by eye, the voltage in HKJ’s test is a little bit higher (so, the flashlight would light up a little brighter). I don’t have the means to test it at any higher current. I don’t think I would get a comfortable 7 A discharge out of mine. But as I stated, it works good in the light and I thought the comparision with the Acebeam shows that is a very good performer, and certainly a good cell overall. Which means that I’m also happy with mine.
I absolutely agree. And it is still bound to the laws of physics and chemistry 
Well, if you bought enough pieces from different batches, you could see the “differences”. I did so, let me show you some of my results.
I bought more than 30, however I’m a bit tired of verifying their inconsistency…they are still the best 16340’s you can buy though.
I bought 4 pieces of the Vapcell 16340 tested in post #22. You cannot expect 100% consistency. Even the famous Panasonic/Sanyo NCR18650GA I tested varies from 3,375mah to 3,631mah but it is still my all time favorite high capacity 18650 because other high capacities like the Samsung 36G rated at 3,600mah measures between 3,328mah to 3,463mah out of the 5 I bought. It is common for batteries to measure much lower than rated capacity and wide variations between the same batch of cells. There are a few exceptions like the Acebeam 16340, Shockli 5500mah and Vapcell 5500mah that consistently measure a good amount more than the label.
I do not believe the recent batch of Vapcell 16340 I bought is any worse than the batch HKJ tested. Sure there’s inconsistencies just like with any other batteries.
NCR18650GA is certainly a good cell, but those available in the retail market are of different batches and more importantly, different ranks/grades. But their consistency are usually pretty good in a single purchase, as long as the date of manufacturing and rank are the same. This is the common fact you can usually expect when buying those tier-1 products (from a trustworthy retailer, of course). Samsung 36G can be a poor counter-example here, because those 36G available in the retail market are almost early production samples made years ago, not mature products at all.
My test results are shared simply to indicate that although these Vapcell 16340’s currently the best choice, one cannot always expect as good performance as others, and the difference within a single purchase can be as large as ~15% or more (my worst = ~660mAh@5A, my best = ~780mAh@5A). But even the worst one is still better than other 16340’s, so… 
The 36G is not rated 3600mAh, but 3350mAh (check “nominal capacity” in HKJ's review).
If were to choose a cell for battery pack assembly given those terrible consistency figures you provide, I'd go with the 36G.
It is common for batteries to measure much lower? Piss off with that. If we want this to end we must tell manufacturers and mainly rewrappers to @#$% off and start doing things as the Lord commands.
Do you realize how much effort it can take to build a big battery pack if you can't rely on excellent cell consistency? A lot more than if you can, of course. I even know the percentile measuring differences among my Lii-500 rails, just in case I were to need it. Measuring and binning a big pack involves time, effort and money.