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

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NightCrawl
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What do you mean with regular review test thread? The guy that tests them for me has nowhere near the equipment HKJ has. So all I have are discharge curves. We might publish an IMR shootout in the future, but some people were interested in the new Samsung cells. And because the recent king of IMR was AW I decided to share a few curves upfront. Smile

JackCY
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Ah, ok, the discharge curves are very confusing, 20A 2Ah, 7.5A 1.3Ah? etc.

I just asked HKJ some minutes ago if he could test it. I will get one myself but I can’t test discharge much or make curves.

NightCrawl
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Yeah, I put a value wrong when plotting the 7.5A curve. Fixed it now, thanks for pointing that out. What else is confusing?

JackCY
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Oh, if you can regenerate them, use a single axis scale, so all graphs have the same X and Y values, min, max, step.

I guess that was the only one wrong. 5A seems correct I think maybe tiny bit lower than 7.5A, who knows. 10A seems longer than the previous two.

Hmm I guess just sort out the X axis values, put them true, not fictional Wink

NightCrawl
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I prefered the fictional X-axis, but I changed it so you can compare them better. Also added 15A curve.

JackCY
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Thanks.

I just bought one. I would suggest if anybody wants these, probably jump on it.
They were $6.50 and got sold out. Asked to have them relisted, waited a day for IS to get another order confirmed and these went up to $8.89 with shipping, after they sold sold 63 pieces in one day.
Wrote them I’m not going to buy it for that price since they have been much cheaper especially when I want just 1 piece. Got them discounted to $7.49 with shipping.
So if anybody wants one, go ahead, I don’t know how long they will stay cheaper.
They do make packs/add solder tabs for free as well if you want to make yourself a pack for some device! Which I find a really great option.

$7.49 Samsung INR18650-20R 20A 2000mah 3.6V Li-ion Rechargeable

They also have the lower rated 20Q version with “only” 15A rating. In my opinion they are probably 2nd tier batteries, you know, Samsung sorts batteries based on internal resistance or something, some factor that determines how hard discharge they can handle.

$6.95 Samsung INR18650-20Q 15A 2000mah 3.6V Li-ion

Second cheapest source if you want just 1 battery is here, paypal and shipped as well:

8.22 EUR Akkula.fi Samsung INR18650-20R

Will post my low amperage test once it gets here.

___

BTW there are also 13R and 15R versions that have lower capacity but some are rated up to 25A. They are on eBay too.

Samsung’s description of the various batteries.

13Q and 15Q are rated 18A, also on eBay.

nofearek9
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i bought the “20R” from the same guy at 16/02 for 6.50 now they have for 6,99 still good price.

JackCY
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nofearek9 wrote:
i bought the “20R” from the same guy at 16/02 for 6.50 now they have for 6,99 still good price.

$7.49 with shipping. Yes they had a really good price for them for some time.
NightCrawl
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The older Samsung INR cells are rated higher but dont hold up to high discharge so well. There are reviews of the -13 and -15 cells out there and based on them, I ruled them out. When I was told that these cells are used in power tool packs by German manufacturers, I had to get some and I wasnt disappointed.

 

Also, low amperage tests are boring. Wink

3A:

2A (no AW, sorry):

1A:

 

As you can see, there are better cells for lower currents.

I updated the first post with a graph containing all curves of the Samsung.

You may link the pictures, but please refer to this thread if you do so.

migueralliart
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I was the one that ordered 60 cells … my intent is to use it for an ebike battery pack. They build the packs well with 6 spot welds per cell.

DB Custom
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I was just wondering, what happens if you use these high capacity cells in a light that is direct drive, will the high discharge rate be too much for a single emitter or will they only deliver what the emitter wants to pull?

NightCrawl
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The current the emitter pulls is determined by the forward voltage. Now if the cell holds a high voltage under load, it might pump lots of amps into a single emitter. So in direct drive lights I'm sure you would kill most LEDs using this cell.

Werner
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But think of that this cell doesn’t hold voltage so good when operating in low current.

SpaceCowboy
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NightCrawl You definitely should try WX from Sanyo.

Panasonic NCR18650 PD is the best performer in capacity/voltage drop field.

NightCrawl
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Sanyo WX is outperformed by Samsung 20R. Wink

PD is also nice, but not for high loads.

SpaceCowboy
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Have you tried to test them at actual high load of 10A.

This is Panasonic PD at 10A and 3A (pay attention on capacity).

http://www.orbtronic.com/images/products/secondary/pd2900-top-2.jpg

DB Custom
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Doesn’t look to me like the Amp rates given in that chart SC would allow the Panny to deliver even an hour of decent output from an XM-L2. Forward voltage would sag so quickly all the effort for copper heatsinks and star boards would be lost due to being driven by a quickly weak cell.

Like I said, I’m learning so be nice….but that’s what it looks like from this neck o the woods. Am I missing something?

Shadowww
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DBCstm wrote:
Like I said, I’m learning so be nice….but that’s what it looks like from this neck o the woods. Am I missing something?

You’re missing a nice buck/boost driver that doesn’t gives a damn about the input voltage Wink
NightCrawl
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SpaceCowboy wrote:
Have you tried to test them at actual high load of 10A. This is Panasonic PD at 10A and 3A (pay attention on capacity). http://www.orbtronic.com/images/products/secondary/pd2900-top-2.jpg[/quote]

Not yet, but soon to come. Its already a close call at 7.5A and it has a higher internal resistance so it will sag more.

Shadowww wrote:
DBCstm wrote:
Like I said, I'm learning so be nice....but that's what it looks like from this neck o the woods. Am I missing something?
You're missing a nice buck/boost driver that doesn't gives a damn about the input voltage ;)

Too bad we dont have those for 3A+ already.

DB Custom
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Ah yes, It’s always the sum of the parts, as much as it is the parts themselves. These are the things that make this such a learning experience. The combinations that make it work just so.

Sometimes elusive, like finding which Particular powder and which Particular bullet at which Particular recipe your new Particular gun likes the most. Fun finding it, but it can be a daunting and elusive mix finding the equation that meets the required parameters. And when it’s found, Sweeeeet!

Thanks for the input, will try to keep all this in mind as I delve deeper into modding my new HD2010.

And by the way Nightcrawl, for once, a rare occasion indeed, I’m letting my intelligence pursuade my stubborness that melting copper is not in the near future for me. Wink

NightCrawl
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Sorry to hear that, I'd have loved to see a video of you doing that. Smile

DB Custom
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Yeah, I bet. I found plenty of video showing how to go about it, which is why my intelligence won over. Just barely smart enough to realize that I do not want molten copper poured on my foot or anywhere else in near proximity to my body for a tiny little dimple in the back of an already copper star. Might could accomplish it, but what’s it worth?

So much to learn, a priority among those being to not be too stubborn to learn it.

wikiman
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Can anyone do the test of Samsung ICR18650-26F
I have these cells and they are great below 5A and also are cheaper than Sanyo UR18650FM.

NightCrawl
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wikiman
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Ok, but these are protected.

NightCrawl
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Yes, but protection doesnt change the discharge curve, it just lowers the voltage.

The cells are pretty similar, except for the Samsung dropping a little faster towards the end. But the difference is negligible imo.

wikiman
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Thanks NightCrawl

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Thanks very much for the review! Frontpage’d and Sticky’d.

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