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

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.

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. ;)

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.

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.

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?

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.

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

NightCrawl You definitely should try WX from Sanyo.

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

Sanyo WX is outperformed by Samsung 20R. ;)

PD is also nice, but not for high loads.

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

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?

You’re missing a nice buck/boost driver that doesn’t gives a damn about the input voltage :wink:

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.

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

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:

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

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.

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.

HKJ tested the Enerpower 2600mAh, built with the cell you mentioned:

http://lygte-info.dk/review/batteries2012/EnerPower%2018650%202600mAh%20(Black)%20UK.html

For reference, the Sanyo UR18650FM with the same PCB:

http://lygte-info.dk/review/batteries2012/Spark%2018650%202600%20mAh%20(Black)%20UK.html

Or compare them:

http://lygte-info.dk/review/batteries2012/Common18650comparator.php

Ok, but these are protected.

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.