I received my battery order from 18650batterystore.com and took capacity measurements with my Xtar VP4 Plus Dragon charger:
Samsung 21700 30T (not rewrap) : 3,171 mah
Efest 21700 5000mah: 5,035 mah (Mooch said it’s probably an LG M50 inside)
QSO Samsung 21700 40T (red wrapper): 4,091, 4,013 mah
Vapcell 21700 40T (gold color wrapper): 4,038 mah
Vapcell 21700 VTC6A (black color wrapper): 4,186 mah (This one has the QR code square at the bottom. Mooch said the older versions do not have it and have slightly less capacity)
QSO Sony 21700 VTC6A (black color wrapper): 4,055, 4,022 mah (This one is odd because the charge capacity are 4,2xx, which is 200mah higher than the measured discharge capacity. Usually the charge and discharge capacity are very close within 50mah. Mooch got 4,1xx mah on the samples from the same store. This also has the QR code. Maybe my charger terminated the discharge a little too soon on these)
I think the VTC6A might be a slightly better battery than the 40T just like the VTC6 is better than the 30Q. Mooch rates the VTC6A at 30A continuous. I hope HKJ can test the VTC6A soon so we can have it in the comparator
It’s better to calm down. Nobody it trying to get you. We are just trying to learn. We flashlight guys don’t usually learn of a new battery until it’s available for retail sales so we can be a bit behind the times.
Do you have any idea of the difference between the 50G and 50E? Maybe they are the same battery just sold to different markets? I really can’t see any difference. They should both have the same capacity and current output.
That’s what a technician from QB told me: The 50G and the 50E, differs from each other by their respective chemistries which are different as well as their lifetime (depending on the discharge levels in amperes , depending on the use their life cycles will be different). Otherwise, yes for the specifications in general they are the same for both: Nominal 5000mAh and 10A continuous discharge. The 50E is officially intended for use in electric vehicle batterypacks (in short, they are certainly optimized for this use).
Wow, you’ve been on a 21700 buying spree! :partying_face:
There’s something about this statement that seems off “just like the VTC6 is better than the 30Q”. I remember some folks talking about how the vtc6 degrades faster or something. So I would put the 30Q as being the better cell. At least by a small margin. I can’t find that conversation. Do any of you guys remember this?
Okay, since I think most electric vehicles only charge their cells up to around four volts (for longer life and faster recharges) maybe they optimized the chemistry just for that application = Longer life and more charge/recharge cycles at 4v or less.
IDK, I’m just guessing here. Then the 50E is the consumer or general purpose version.
Yep there were some sales on 18650batterystore.com and there’s also free shipping when I buy over $100 so I thought might as well. Also I think VTC6 is better than the 30Q based on HKJ’s comparator. VTC6 also has more capacity.
Nobody else has any theory or assumptions, I accept even the craziest ideas? lol … I’ll give the answer in a few hours, by then, good luck. A clue: Myself, when I was looking for this answer a few months ago, I was building extravagant theories when the answer is not that complicated at first sight.
Not sure what do you mean. One cell is 2 years older than the other. Which suggest that one is an older model than the other.
Designation 40S suggests lower discharge rate than 40T. Which may be due to internal improvements. Or may be due to other factors.
My guess is that 40S is just older and technically worse cell.
But maybe you meant something else?
Well, because you’re really close to the right answer, and if I keep telling you that it’s not exactly that, there’s a risk of both going around the answer for a very long time moment, so I give you the right answer.
The 40S is the starting denomination of the 40T, because during its design and as you said before its chemistry and its internal settings were slightly different, which after multiple tests on the part of Samsung SDI engineers was resulted in a significant improvement in its discharge capacity and internal resistance, which pushed them in the end renamed the INR21700-40S to INR21700-40T, so to sum up the 40S is the pre-release of the 40T.
P.S .: Thanks to the Vapcell Technical Manager for enlightening me on this subject.
Thanks for the response. I just checked and the price for the VTC6A is $16.99. I guess I missed the sale price… I guess I’ll wait for the prices to go down a little but I ordered one of the sofirn 21700 lights and need a cell for it. I guess I can use a 20700 or 18650 with a sleeve for now.
