Test/Review of Samsung INR18650-25R 2500mAh (Green)

Samsung INR18650-25R 2500mAh (Green)

Official specifications:

  • Nominal discharge capacity: 2,500mAh
  • Nominal voltage: 3.6V
  • Standard charge: CCCV, 1.25A, 4.20 ± 0.05 V, 100mA cut-off
  • Rapid charge: CCCV, 4A, 4.20 ± 0.05 V, 100mA cut-off
  • Charging time: Standard charge : 180min / 100mA cut-off
  • Rapid charge: 60min (at 25°C) / 100mA cut-off
  • Max. continuous discharge: 20A(at 25°C), 60% at 250 cycle
  • Discharge cut-off voltage: 2.5V
  • Cell weight: 45.0g max
  • Cell dimension: Height : 64.85 ± 0.15mm, Diameter : 18.33 ± 0.07mm
  • Operating temperature (surface temperature): Charge : 0 to 50°C (recommended recharge release < 45°C), Discharge: -20 to 75°C (recommended
  • re-discharge release < 60°C)
  • Storage temperature (Recovery 90% after storage): 1.5 year -30~25°C, 3 months -30~45°C, 1 month -30~60°C

This is the high capacity, high current cell from Samsung.

There is good trakcing between the two cells and the capacity does only drop slowly with load. The 30A discharge is to high for this battery.


This is one of the good high current, high capacity batteries, it has good performance, but it is not the best of them.

Notes and links

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

THanks as usual for the nice work!
Known diffferences between these and the light blue wrapped on fasttech?

… like what…? What are the currently available batterie that outperform these 25R…HE2/4?

Check my comparator. The Sony is best but unavailable (I believe), next is HE2.

i suspected you were referring to the VTC5.
THanks, for the clarification!

10x for the great review!

Was about time, especialy for one of the best high drain cells…maybe even the best considering the fact that it can be found in EU for under 3.5 euros…vs VTC5 at a double( even trippe) price? Thanks but no thanks…a dealer even offered me once VTC5 for 14 euros cause they were “great”…Makita uses only those you know…and he had a box hidden for special customers…right :slight_smile:

Btw at VTC5 runs hotter than 25r, i use them both in my mech mod

what is the difference between the green and the blue ones?

I do not know that, but I have used your link and ordered two cells (Thanks).

ouch - in my deals thread there is a code for them (safes nearly a Dollar :wink: )

but i am looking forward to your results (because i also have a pair of them )

All of the 25Rs I have are blue, until now I hadn’t seen a green one.

Thanks for the review.

I have the HE2’s[K’Power version] and the Efest 35A. They both work well w/ the HE2’s with slightly less of a Voltage sag than the Efests.

Thanks to your comparator which is very helpful! One night I was comparing batteries for ~ 2 hours!! :wink: ,I know,get a life!! lol! ,I just have alot of spare time!

They are same, sometimes green, sometimes blue i buy those like every month from NKOL , and the seller stated there isnt any difference between blue and green

Some states that greens are fakes but thats not true, vise versa: a korean guy( it was either in FT forum or CPF) pointed out that since 10.2014 only green ones should be produced

Can you please give us a link of that shop in EU where you buy batteries, thanks. I am ordering from Fasttech but it takes way to long to get them.

He was referring to

banggood ships in around 14 days to Austria (atm they sell for 11.25 a pair :wink: )

Thanks for the review HKJ, and I knew you had a back log but these and the HE2 you recently reviewed make it clear how back logged you must be.

Theres a North Korean Old Lumens?

Indeed, i ordered 2 times batteries from Banggood, and they came in like 2-3-4 weeks, but on the CN they were declared as chargers, hehe, both times

Err……can you translate this one pls? :slight_smile:

The joke is that there is a North Korean clone of our Old Lumens (Justin) who makes and modifies lights with excellent attention to detail using minimal power tools. Known for his file work especially.

Thanks HKJ, appreciate the review. I knew the 25R was a bit below the 35A in performance, but didn’t realize exactly how the HE-2 and 35A compared. It was said that the Purple 35A was a rewrapped HE-2 but I knew better, the lights showed me. :wink: Close, but no cigar.

Your comparator is awesome! I wish it could be expanded to directly compare 3 or 4 cells simultaneously but oh well. :slight_smile:

Back to MTN for more HE-2’s, :wink:

The KeepPower IMR 2500mAh with white labels ( old ) , has within the LG HE2.
The new KeepPower IMR 2500mAh black, has within the Samsung 25R.
The old is really very powerful battery .
In relation to the Efest 2500 purple, is stronger .
But if she is the black then it is weaker up to 3.8 V.
From there down, it’s better the performance.

Sorry, but I think Samsung 25R (Green), is much better.
I bought 20 such batteries (not all for me of course) from NKON and is flawless.
I am steamer Electronic Cigarettes and discharge into machine mod, is the most often from 3 Amps and can even reach 90 Amps (0.1 Oms in 3 Volts.)
Naturally me personally, do not care to 90 Amps, but for discharge of 5 - 7 Amps. , My 25R Samsung have shown to be the best.
Even the Sony VTC5.
The HE2 / 4 is the strongest of the 4.2 V up to 3.8V. After the 3.7 Volts, is the marked their weakness, more than the other two (VTC5-25R)

Measured Volts from fresh battery to 4.2V, all have almost the same performance, but from the 3.8V and then the 25R is purely the strongest battery of the three, up to 3.3V, which will go for charging.

For me it is all three (four with HE4) batteries are very good, but I personally have seen the best performance in electronic cigarette with the 25R, the Ohm these.

After the 10 Amps yes, Sony is better, but personally 10 AMPS in electronic cigarette, avoid them.

I was surprised, however, the very low yield of the test, especially since I have these batteries and I see that the same performance with the blue.

Henrik, a big thank you for your trouble, my friend.
If it was you, little would know.

Always be well man.


How come in HKJ’s review and comparator he has the IMR Keeppower Black 2014 cell listed as LG ICR18650HE2???

P.S. I quit smoking 18 years ago. I do not Vape!!! The batteries work well in my Modified search lights! 8)

I think I’ve read somewhere that the green 25R are the newer ones, they changed the color, so the blue ones are simply from an earlier production.

As far as I’m concerned all of my lights draw the highest amps from the HE4, higher than HE2 and 25R. If you scroll down on this page, you’ll find curves at 20A of the HE4 vs the HE2 and the HE4 vs the VTC5.