Test/review of Samsung INR21700-40T 4000mAh (Cyan)

To clarify, I was refering to flashlight users such as all of us here. We donā€™t monitor battery temps in flashlights (unless we need to).

Iā€™m sure these new higher ratings the manufacturers are using are more for vehicle use where they are water cooled and monitored closely. Or tool use or vacuum use etcā€¦ where temperatures can at least be monitored.

We are just low-tech bums. We have to take the battery out of our flashlight and measure the temperature by hand and go ā€œEwww boy, that sure feels hot!ā€. Lol

HERE is the:

Samsung INR21700-50E Rechargeable 10a High Drain Battery 5000mAh flat top.

ā€œIFā€ those specs are right it is Only 10A Not 20/25A like the 40T.

A modern high capacity battery is never going to match the output of a high current battery. The manufacturers are able to tweak their chemical mix to either maximize capacity or current or anywhere in between. This is why the 30T has the highest current, but the lowest capacity and the 50E has the highest capacity but lowest current. Then the 40T is right in the middle between current and capacity.

(Iā€™m talking about continuous current ratings like HKJ and Mooch use)

^
Right.I understand that.

The reason I said that[10A only] is because Hydraxx said the 50T[50E?] is replacing the 40T. So one would assume it would be an Upgrade in capacity and output,at least that is how I would interpret it.

He said 50G replaced 48G, but nobody can find anything about 50G.

Your right!! My bad!! :open_mouth:

,T, G, E,It is getting all mixed up and confusing!

No, I did say 50G, the 50E it, is a different version, with a different chemistry and a different life because it is originally intended for the electric vehicle industry specifically, the first versions of test ( TestBuild in Samsung jargon) with an inscription ā€œEV21700-50Gā€ on the cell, ā€œEVā€ as you would guess for ā€œElectric Vehicleā€. And indeed you will find little reference to 50G because initially they were sold almost exclusively in closed market (reserved for professionals and industry), the only ones to my knowledge to have obtained a significant amount of these cells 50G is VapCell and still it did not last, they quickly replaced by LG M50 in their ā€œVapCell Purple 21700 5000mAh 10Aā€: the first versions sold were Samsung 50G then once their stock of 50G exhausted, they passed on LG M50s that are equivalent in terms of performance (although the capacity of the M50 is a little better in practice of about 50-100mAh).

Here is the news confirming what I say about the Samsung 50G replaced by LG M50, on the VapCell website: http://www.vapcelltech.com/index.php/Show/index/cid/44/id/11 .html

And a photo of a cell ā€œTestBuildā€ Samsung 50G with the inscription EV on its metal cylinder:

Treat me as a liar, it will be more direct and less cowardly on your part, seriously, I would win what to lie to you, for proof: A big French company of the energy field lists in its data the Samsung INR21700-50G: https: // www.arts-energy.com/fr/solutions/accumulateurs-li-ion/gamme-li-ion-power/, itā€™s still a crazy thing on this forum, as soon as we say something that other users do not know and we are recently registered on this forum, we are considered a liar, I am getting a little tired of proving my good faith, do I treat you as a liar or even I sub- hear, yet I do not know you?

Calmly, weā€™re all here to share our knowledge and debate, thatā€™s how a community learns and evolves, not pulling around and being suspicious of each other.

Itā€™s easier to just disregard pretty much all of what he says as a rule of thumb

Dude, relax. I did not call you a liar. All I stated is that we couldnā€™t find anything about 50G. Please donā€™t get offended by things I did not say. :slight_smile:

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 itā€™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

Itā€™s better to calm down. Nobody it trying to get you. We are just trying to learn. We flashlight guys donā€™t usually learn of a new battery until itā€™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 canā€™t see any difference. They should both have the same capacity and current output.

Thatā€™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, youā€™ve been on a 21700 buying spree! :partying_face:

Thereā€™s something about this statement that seems off ā€œjust like the VTC6 is better than the 30Qā€. 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 canā€™t find that conversation. Do any of you guys remember this?

Hold I have a puzzle question for you guys, whatā€™s the difference between these two Samsung models? (Me, for my part I know the answer, hehe)

I think you mean 50G is for EV use.

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, Iā€™m just guessing here. Then the 50E is the consumer or general purpose version.

I have no idea. Iā€™m still waiting on my first 21700 flashlight. Lol

Yep there were some sales on 18650batterystore.com and thereā€™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 HKJā€™s comparator. VTC6 also has more capacity.

Nobody else has any theory or assumptions, I accept even the craziest ideas? lol ā€¦ Iā€™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.

Why are the Samsung 21700 cells so expensive? Samsung 40T goes for like $20 on imrbatteries.