Test / Review: Samsung INR18650-20R (also AW dethroned)

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MattSPL
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Yeah, learning myself too. I had the Led mounted on copper, and it pulled 7Amps of a couple of other different 18650’s, so i just couldn’t resist trying the new INR’s that arrived that day Smile

MRsDNF
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MattSPL wrote:
I ran one of the INR's into a Direct drive XML P60 while measuring the current draw. I measured nearly 10Amps for about 2 seconds and the little wires in the Led melted, along with the inner part of the dome near the wires.

You gotta love these experiments. Nice.Laughing

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

Werner
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That seems to be what I need.
To sad that enerdan don’t sell these as single cell. Perhaps I ask about that.

nofearek9
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that the samsung you used? : http://www.ebay.com/itm/Original-Samsung-INR18650-20R-SDI-3-6V-2000mAh-Li-ion-Rechargeable-Battery-/261134798326?pt=US_Rechargeable_Batteries&hash=item3cccd8cdf6

MattSPL
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nofearek9 wrote:
that the samsung you used? : http://www.ebay.com/itm/Original-Samsung-INR18650-20R-SDI-3-6V-2000mAh-Li-ion-Rechargeable-Battery-/261134798326?pt=US_Rechargeable_Batteries&hash=item3cccd8cdf6

Yes, they are the ones Smile

nofearek9
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the price is good.

DarkSide
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jmpaul320 wrote:
very interesting… i wonder how that same samsung compares to aw imr 2000mah

Its the 1600mah AW’s <15A discharge. And tested above 15A

Samsungs are great cell, i wish you could buy them new rather then pulling them
or buying pulled cells off Fleebay…I’ll stick with the AW’s…

 


MattSPL
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DarkSide wrote:
jmpaul320 wrote:
very interesting… i wonder how that same samsung compares to aw imr 2000mah

Its the 1600mah AW’s <15A discharge. And tested above 15A

Samsungs are great cell, i wish you could buy them new rather then pulling them
or buying pulled cells off Fleebay…I’ll stick with the AW’s…

The samsungs that Enerdan sells are new, not pulled cells.

DarkSide
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Good to know…Thanks

 


NightCrawl
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@nofearek9: I linked them in post #5.

@DarkSide: See post #5. I got the ones from China, they are genuine and not used. And Enerdan wont sell used cells. Wink

migueralliart
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Do u have a graph with 5c discharge?

NightCrawl
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migueralliart
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This is an impressive little cell…. It just doesn’t sag too much like you expect it to from a 18650 cell.

Do u have more graphs available ? Just wondering.

Werner
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I have got one last week, indeed a nice currentdeliverer.
And it reaches the rated capacity! The most cells are at least 100mAh overrated.

NightCrawl
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I've got almost anything from 1A to 20A but most is not really interesting. Up to 10A you are better off with the Panasonic NCR18650PD. And from 10A up the Samsung 20R is the way to go. I can think of 2 cells that might be better but those are exclusively used in battery packs.

migueralliart
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Can u post 2c for comparison purposes. I’m not familiar with the Panasonic’s but I’m pretty sure at 2c they will sag more than these.

Sorry to keep asking for graphs.

migueralliart
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These are not IMR but INR for low discharge the 3.4ah is good but the 2.9 is better and sags less

NightCrawl
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2C is a wide range. Wink

2C is 5.8A for Panasonic -PD, 3.2A for AW IMR 1600mAh and 4A for Samsung -20R.

So here are 5A and 7.5A.

At 5A, there is no real surprise. Up to 5A I'd say stick with the Sanyo -FM if you already have them. If you need more runtime, the -PD.

At 7.5A the Sanyo -FM would be beyond specs and gets hot. We dont want that, so no graph for that cell.

The three cells have a very similar discharge curve with the -PD having a lot more capacity. In this graph it was only discharged to about 2.9V. Discharging it to 2.5V would give about 800mAh more capacity.

 

/edit:

kreisler wrote:
i have Panasonic cell which are protected and has 3400mah capacities.

that beats Samsung IMR twice Wink

but my mp3-player by Samsung is 8GB vely good i like!!

hehe

Ignore kreisler, he is just trolling. Silly Protected cells are for girls btw.!

Werner
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Why do you recommend the Sanyo FM? Because it is the better choice at 3A…?
In the 5A and 7.5A diagrams the PD is the best…?

NightCrawl
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In the last third the -FM has a higher voltage than the -PD. But you are right, I should have said it differently and therefore edited my post. I'll explain:

It all depends on the light. I have single cell lights exclusively. Now if you are like me or mainly use single cell lights, the 3A and 5A discharge curves are those that matter.

Triple or quad XPGs might pull up to 5A while still having a relatively low vF of about 3.2V @ 1.5A if I remember correctly. In the last third of the discharge curve, the Sanyo -FM is still well above 3.2V while the -PD isnt. Also, most people already have Sanyo -FM based cells while the -PD is rather new.

So if you wont draw more than 5A from one cell, the Sanyo -FM is still great.

Werner
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These tests were all made with unprotected cells, right?
I looked a lot at the discharge curves from HKJ and recognized that protected cells have lower voltage curves, it seems they are just shifted parallel a bit down.

NightCrawl
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Yup, all unprotected. Protection lowers the voltage quite a bit due to more resistance. The more amps you draw from a cell, the higher the difference will be.

xed888
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Will the Samsung cell vent when abused? As in, will it be have like an IMR? Thanks

NightCrawl
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Well, they are IMR cells. No regular cell would hold such a high voltage under load or even get through that without melting. For example, the Panasonic NCR18650E rated for 20A got so hot at 20A that the shrinkwrap around the negative terminal crumpled.

The Samsung -20R is UL listed and used in some power tools made in Germany.. so I consider them as being save. Wink

xed888
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NightCrawl wrote:

Well, they are IMR cells. No regular cell would hold such a high voltage under load or even get through that without melting. For example, the Panasonic NCR18650E rated for 20A got so hot at 20A that the shrinkwrap around the negative terminal crumpled.

The Samsung -20R is UL listed and used in some power tools made in Germany.. so I consider them as being save. Wink

Thanks for the response!

migueralliart
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When you do these discharge tests, do you usually log temps as well?

NightCrawl
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I didnt do them and no. But touching the cells after discharging works well. Big Smile

Werner
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Is it UL tested so far?
I thought that this will come later this year…?

NightCrawl
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I assumed it. An engineer of a well known German power tool brand told me that they have to use UL certified cells if built in Germany. Maybe he was talking just about an internal "law" in his company?

JackCY
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Will you write up a regular review test thread of these new Samsung INRs?

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