Are these real and verified Shockli products, or they are knockoffs in a way?
https://www.gearbest.com/batteries-airplane/pp_009196499872.html
https://www.gearbest.com/batteries-airplane/pp_009195613291.html
I am curious, how much they stand up to their specification.
Edit: the 26650 one seems to be quite real, as i could see here.
Still the 3600mAh 18650 with 25A continuous discharge might worth taking a deeper look.
The Shockli IMR26650 5500mAh was HKJ tested. It is a PLB INR26650-55A cell under the wrap, at least for as long as they remain faithful to their word on… Aaah! Rewrappers who do not disclose which cell is under the wrap and neither commit to keep the good thing inside. We can only hope they keep using the PLB INR26650-55A cell in the future.
The 3600mAh 25A? 
The best 25A continuous rated 18650s in the market are very recent Sony cells, namely the VTC5D. Way different capacity rating, ¿eh?
If we were to presume it could be a 3600mAh cell, it's myth is busted even faster. The Samsung INR18650-35E is the high capacity king in its class, and can only deliver 3.3 to 3.4Ah (depending on depth of discharge) at 0.2C, while its continuous current rating is 10A…
Cheers my dears :-)
Shockli is not a really big brand and I would be surprised if anybody would make fake Shockli products.
I frequently get batteries from them and test them, I.e. all my Shockli test are done on batteries supplies from Shockli,
Generally I believe that manufactures send me the genie product, in most cases that is correct, but if somebody get a product that do not match my testing, please post it in my review thread (including where you got it). For me it is rather important to know if a manufacture gives me top of the line review cells ir give me a regular cell.
Samsung INR21700-50E ?
Reportedly, can be found with Acebeam “5100 mAh” wraps: My ACEBEAM EC65 XHP35 HI is dead (Now fixed!)
I found no source for it other than Acebeam.
Thank you for the additional info on the 26650 cell :-)
About the 18650 one, well, yeah, I do not believe that specification as well. Still I will take a look at it, as Shockli wrapped batteries had set up themselves a good standard of quality. The initial impedance of 38 mOhms let me guess a max. current of 8-10A, as well.
Any chance to get a flashlight driver reviewed?
3000mA 3-Mode LED Flashlight Driver Circuit Board @FastTech (SKU 4594600)
Onboard PIC12F683 and AON7520 MOSFET.
I've already used some and I like them a lot, even despite the possibility of it using PWM in all modes (looks like it senses Vdrop at R010 resistor). Would like to know the PWM frequency.
Starts to blink quite slowly (like breathing light) at unknown voltage cut-off.
If there's chance, I'd be willing to donate money to order a piece (€4?).
Thanks. :-)
Cheers ^:)
I ordered one. You can always donate some money if I review it.
Thanks HKJ. I'm sending you an €4 tip. :-)
That AON7520 MOSFET looks quite powerful. RDS(ON) at VGS 2.5V, ID 20A: typ 2.35mΩ, max 3.1mΩ.
Output regulated MOSFET driver. Combined with a high discharge cell and modding Rsense… 
Cheers ^:)
Hello!
Received a Samsung INR18650-25R 4-pack from a shady AliExpress seller (217753 store number):
The cells look suspicious. Cell top may be 3x lobe/prong but they do not look exactly like others I've seen in known genuine 25R/30Q cells. They're geometrically a bit different, and seem like dual sheet composed/made. Then the wraps… :facepalm:
I am planning on setting up a way to check out their internal resistance, aided with a precision power supply and a milivolt precision voltmeter. Hope I can render valuable data of it.
Cheers ^:)
Original post date: Mon, 07/16/2018 - 16:55. Edited for a correction.
Petition to HKJ: could you please make a brief test with one of the li-ion cells you're right now testing to make sure the charging dV/I is equivalent to the one exhibitted on discharge? Just to make sure, had a bit of arguing in this respect with Mooch (E-CigaretteForum tester) a few days back.
Cheers ^:)
I’ve tried the charge method of testing Ri and it seemed to be pretty accurate from my small sample size of couple different 18650s compared to actually using an electronic load.
I put up a test script to do it on a SourceMeter where I both charged and discharged with 1A.
Because I use 1A the mV values are the same as mOhm.
I did 11 test each with a charge and a discharge, with 10 seconds between each operation and each operation was 10 seconds long. In the chart I have only included the 8 last tests.
It looks very symmetrical, i.e. charge and discharge resistance is about the same.
Thanks a lot HKJ, result is exactly as I presumed.
I'll briefly test those 25Rs I received. Honestly not yet tested because I've realized a noticeable resting voltage drop a few hours after being settled a little above 3.7V, completely unexpected if you ask me. Thus I'm slowly raising them up to ≈3.8V this time just to check out for elevated self discharge.
AliExpress' cell market, at least with regards to the usual/popular 18650s, is in an alarming state… :facepalm:
:-)
Hi HKJ.,
I am Not sure if this was requested because I have not looked through the entire thread!
How about testing the VTC5D AKA Vapcell IMR 18650 2800mAh 25A?
Thanks 
EDIT: I see it mentioned in post #471 but there did not seem to be a request for it,just showed mooch’s test results.
Here was my capacity test for 2 of them i got from Liionwholesale.
I am looking for never VTC cells, but have not found them yet. I may also test the Vapcell, but it will be called Vapcell.
You can thank Crapcell for buying out the limited production supply of these newer cells and selling them with a different @#$% wrapper at a much higher price. In exchange, the uneducated consumer gets data he/she is probably not up to the task of properly taking advantage of, and the expert gets nothing or even less because nothing beats a datasheet and a genuinely wrapped genuine cell. Did I woke up this morning on my left foot? Probably… 
You can hit the Rude! button now if you wish.
Cheers
You gotta be more rude for that first. 
(By the way, I do not advise that.)
A few weeks earlier I considered to buy a few Samsung 21700-40T, but I cannot justify $20+ for a single cell. Also, I saw Mooch's warning, that he received somewhat poorer performing samples recently from Crapcell (I like this! - also another word came into my mind, but I leave that to the reader's imagination), than they were initially.
Update: It is Fapcell (see? minimal change to reach a goal 
). And yes, Shitecell is also a good name.
Btw, sorry HKJ for jamming the thread, but I could not resist.