Test/Review of Samsung ICR18650-26F 2600mAh (Pink)

24 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 6 days 23 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7402
Location: Copenhagen, Denmark
Test/Review of Samsung ICR18650-26F 2600mAh (Pink)

Samsung ICR18650-26F 2600mAh (Pink)

DSC_6313

Official specifications:

  • Nominal Capacity: 2600mAh (0.2C, 2.75V discharge)
  • Minimum Capacity: 2550mAh(0.2C, 2.75V discharge)
  • Charging Voltage: 4.2 ±0.05 V
  • Nominal Voltage: 3.7V
  • Charging Method: CC-CV (constant voltage with limited current)
  • Charging Current: Standard charge: 1300mA, Rapid charge : 2600mA
  • Charging Time: Standard charge : 3hours, Rapid charge : 2.5hours
  • Max. Charge Current: 2600mA (ambient temperature 25°C)
  • Max. Discharge Current: 5200mA (ambient temperature 25°C)
  • Discharge Cut-off Voltage: 2.75V
  • Cell Weight: 47.0g max
  • Cell Dimension: Height : 65.00mm max, Diameter : 18.40mm max,
  • Operating Temperature: Charge : 0 to 45°C, Discharge: -20 to 60°C
  • Storage Temperature 1 year: -20~25°C, 3 months : -20~45°C, 1 month : -20~60°C


Samsung%20ICR18650-26F%202600mAh%20%28Pink%29-info

A standard 2600mAh cell from Samsung.

DSC_6311 DSC_6312

DSC_6314 DSC_6315

DSC_6316
DSC_6317

Samsung%20ICR18650-26F%202600mAh%20%28Pink%29-Capacity

Very nice matching of the two batteries and capacity is nearly independent of load.

Samsung%20ICR18650-26F%202600mAh%20%28Pink%29-CapacityTimeHours

Samsung%20ICR18650-26F%202600mAh%20%28Pink%29-CapacityTime

Samsung%20ICR18650-26F%202600mAh%20%28Pink%29-Energy

Samsung%20ICR18650-26F%202600mAh%20%28Pink%29-PowerLoadTime

Samsung%20ICR18650-26F%202600mAh%20%28Pink%29-TripCurrent

Samsung%20ICR18650-26F%202600mAh%20%28Pink%29-Charge



Conclusion

This is a very good cell for a standard 2600mAh cell.
Remember that the cell is unprotected this means it will have higher voltage at "high" load than protected batteries.



Notes and links

The batteries was supplied by Akkuteile.de for review.

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Compare to 18650 and other batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

lagman
lagman's picture
Offline
Last seen: 6 days 6 hours ago
Joined: 05/13/2014 - 12:24
Posts: 583
Location: France

Thanks HKJ!
Is this a new cell? It seems to me that the capacity is a bit low for a new cell.

My English isn’t perfect but I’m trying to improve it. If you see something that doesn’t sound right or is just plain wrong, please feel free to point it out! Smile

HKJ
HKJ's picture
Offline
Last seen: 6 days 23 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7402
Location: Copenhagen, Denmark

lagman wrote:
Is this a new cell? It seems to me that the capacity is a bit low for a new cell.

Yes, it is a new cell. Many different 2600mAh cells has scored fairly low on capacity in my test.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

lagman
lagman's picture
Offline
Last seen: 6 days 6 hours ago
Joined: 05/13/2014 - 12:24
Posts: 583
Location: France

HKJ wrote:

lagman wrote:
Is this a new cell? It seems to me that the capacity is a bit low for a new cell.

Yes, it is a new cell. Many different 2600mAh cells has scored fairly low on capacity in my test.


It’s true that this one does really hold 2.6Ah. The price seems competitive.

My English isn’t perfect but I’m trying to improve it. If you see something that doesn’t sound right or is just plain wrong, please feel free to point it out! Smile

ledoman
Offline
Last seen: 4 days 15 hours ago
Joined: 09/25/2010 - 06:27
Posts: 937
Location: Slovenia (EU)

By my tests it is full 2600mAh up to 3A when battery is fully topped up with my i2 charger - ie. 4.22V. Very good "all purpose" battery by my opinion.

But WATCH OUT, there are also fakes in the wild. I do have that experience. Similar story like the 4 Samsung at DX.

HKJ
HKJ's picture
Offline
Last seen: 6 days 23 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7402
Location: Copenhagen, Denmark

ledoman wrote:

By my tests it is full 2600mAh up to 3A when battery is fully topped up with my i2 charger - ie. 4.22V. Very good "all purpose" battery by my opinion.

As you can see on my charge curve, my voltage is more like 4.17 or 4.18 volt when I start on the discharge. This difference can account for a couple of percent.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Pulsar13
Pulsar13's picture
Offline
Last seen: 8 months 2 weeks ago
Joined: 02/05/2012 - 10:23
Posts: 1909
Location: Malaysia

I’ve been using this for quite some months – so this is not that new. Price is the best – consistently around $3.50/cell (shop around) – and has relatively low internal resistance for ICR.

None of mine has ever scored lower than 2.6Ah (1A), so they’re really maintaining the capacity throughout batches (I have at least 4 batches). Kudos to Samsung for excellent QC.

I have 3 of these powering my power drill. I know IMR will do better job but these get the job done at half the price, I only use my drill for some DIYs and projects. But I knew the battery didn’t seem to strain so much nevertheless – proven now by 7A HKJ discharge that the battery still maintain 2.5Ah capacity.

Good batteries.

ledoman
Offline
Last seen: 4 days 15 hours ago
Joined: 09/25/2010 - 06:27
Posts: 937
Location: Slovenia (EU)

HKJ wrote:
ledoman wrote:
By my tests it is full 2600mAh up to 3A when battery is fully topped up with my i2 charger - ie. 4.22V. Very good "all purpose" battery by my opinion.

As you can see on my charge curve, my voltage is more like 4.17 or 4.18 volt when I start on the discharge. This difference can account for a couple of percent.

Yes of course. It may add some percentage difference of inaccuracy by my iCharger  106B+ too. Anyway, the batteries are very good and have one of the best price/performance ratio, IMHO.

strongest2004
strongest2004's picture
Offline
Last seen: 1 year 6 months ago
Joined: 01/24/2014 - 19:32
Posts: 370
Location: Philippines

Love these batteries. Performance is very good for my everyday stock lights.

Anyone here tested the protected version?

Low mode and long runtime lover…

Wrathbringer27
Wrathbringer27's picture
Offline
Last seen: 2 days 20 hours ago
Joined: 03/02/2015 - 09:00
Posts: 2122
Location: Singapore GMT +8

What’s the max discharge on this if I were to use the this on the BLF A6?

Words can be broken,
so can bones.

shadockan
shadockan's picture
Offline
Last seen: 5 months 1 day ago
Joined: 09/06/2014 - 06:14
Posts: 139
Location: Trikala Greece

Max. Discharge Current: 5200mA (ambient temperature 25°C) = 5.2 Amperes

Beachlogger
Offline
Last seen: 3 hours 10 min ago
Joined: 12/04/2013 - 23:08
Posts: 994
Location: S.E. Alaska

Are these basically the same as the Samsung icr18650-26c that are laptop pulls?

Abdouzita103
Offline
Last seen: 5 years 7 months ago
Joined: 12/22/2015 - 08:14
Posts: 2
Location: Algeria

Good morning i have samsung icr12650-26f sdi and im really confused which of the six cells are good and which are not good
Each cell contains about 4v and my battery life is not good its about 10 minutes max …..how to check the damaged cells ?
Thanks

dchomak
Offline
Last seen: 3 years 1 month ago
Joined: 03/17/2012 - 20:10
Posts: 4122
Location: Connecticut

I am assuming these came from a laptop battery?
Old worn out cells will probably still charge up, but what happens with old worn out cells is that they will not discharge for very long. They will not hold their rated mAh capacity. Those Samsung 26F’s that you have were rated for 2600mAh when they were new, but if they are very old they would be much less than that now. One way to know for sure is to charge them up with an analyzing charger like the OPUS 3100. That charger will allow you to discharge the cells thru it measuring the total discharge capacity of each cell.

BTW, welcome to BLF

Abdouzita103
Offline
Last seen: 5 years 7 months ago
Joined: 12/22/2015 - 08:14
Posts: 2
Location: Algeria

I just connected a 4.2 v lamp to each cell and same time measuring the voltage across the cell i noticed the value decreasing by 0.001 v each second and after the lamp is off the voltage go back to the initial voltage value do you think this discharge rate is bad ?

dchomak
Offline
Last seen: 3 years 1 month ago
Joined: 03/17/2012 - 20:10
Posts: 4122
Location: Connecticut

Could that really be 0.01V per second. If it was and after 10 seconds it dropped 0.10 volts but came right back up after disconnecting the lamp, I would say the cell is worn out and has high internal resistance.
A thorough discharge test will tell.

Louisq
Offline
Last seen: 1 year 9 months ago
Joined: 12/27/2015 - 23:31
Posts: 3
Location: Minnesota

I’m very new to reading these reports and interested in deciding the safe low limit of this battery in a 13s configuration. How do I learn to parse that?

Louisq
Offline
Last seen: 1 year 9 months ago
Joined: 12/27/2015 - 23:31
Posts: 3
Location: Minnesota

Bad first post?

SawMaster
Offline
Last seen: 1 year 9 months ago
Joined: 05/03/2015 - 17:18
Posts: 1802
Location: SC USA
Louisq wrote:
Bad first post?

Nope, just a slow Tuesday evening for us. Welcome to BLF where lights are bright and wallets thin. Generally all LiIon cells are fine down to 2.8V but some can go a bit lower without damage. Some folks prefer a 3V cut-off which might help maximize cell life. I can’t say for any specific cell; I just go with 2.8V on them all as that is easier on my aging memory.

Phil

Ansarogu
Ansarogu's picture
Offline
Last seen: 4 years 6 months ago
Joined: 03/20/2016 - 03:52
Posts: 25
Location: United States

Hi everyone! Probably no the best place to ask this but i can’t wrap my head around this, i recently found an HP laptop battery and when i looked at the specs it said: 10.8v, 55wh, 4910mah.
So i crack it open and find 6 samsung icr 18650 “28a” cells inside, googled and they are 2800mah cells, what i dont understand is how do 6 2800mah cells equal 4910mah?

HKJ
HKJ's picture
Offline
Last seen: 6 days 23 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7402
Location: Copenhagen, Denmark
Ansarogu wrote:
Hi everyone! Probably no the best place to ask this but i can’t wrap my head around this, i recently found an HP laptop battery and when i looked at the specs it said: 10.8v, 55wh, 4910mah. So i crack it open and find 6 samsung icr 18650 “28a” cells inside, googled and they are 2800mah cells, what i dont understand is how do 6 2800mah cells equal 4910mah?

The 10.8 volt says that the pack has 3 cells in series, this means the 4910mAh is for two cells in parallel.
It sounds like they are underrating the cells or they are undercharging the cells (To get longer lifetime).

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

ledoman
Offline
Last seen: 4 days 15 hours ago
Joined: 09/25/2010 - 06:27
Posts: 937
Location: Slovenia (EU)

In this laptop pack cells are wired in 3 Serial 2 Parallel setup. Capacity is sumary of cells in parallel, voltage of the pack is summary of (nominal voltage) cells in series.

Samsung 28a are 4.30V cells – ie. they have full capacity at that voltage while most others has 4.2V. The pack is probably charging them to 4.2V so the capacity is less (4910mAh) than it could be if they were fully charged up to 4.35V (2×2800 = 5600mAh).

Ansarogu
Ansarogu's picture
Offline
Last seen: 4 years 6 months ago
Joined: 03/20/2016 - 03:52
Posts: 25
Location: United States

Holy smokes! You’re right! It makes perfect sense now! Thanks, and they were under charged, the cell specs state that the fully charged voltage is 4.3v but at 4.2v im only getting around 2300~2400mah, So yeah, thanks again!

Kinetic
Offline
Last seen: 5 months 1 week ago
Joined: 09/13/2016 - 08:22
Posts: 2
Location: cairo

Is it OK to replace Samsung ICR18650-26F 2600mAh included in the OEM Laptop battery with the more powerful Panasonic NCR18650B 3400mAh
I’m worried both batteries have different power output and might cause any problems with the laptop.

ICR18650-26F 2600mAh Specs:
http://budgetlightforum.com/node/33814

NCR18650B 3400mAh Specs:
http://budgetlightforum.com/node/33814 [NCR18650B]