Test/Review of King Kong ICR26650 4200mAh (Gold)

12 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 1 day 5 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark
Test/Review of King Kong ICR26650 4200mAh (Gold)
King Kong ICR26650 4200mAh (Gold)

DSC_3360

Official specifications:
  • Flat Top
  • Volt: 3.7v
  • Capacity: 4200mAh
  • Size:26mmx66mm.
  • Charge currentWeight 95 g

King%20Kong%20ICR26650%204200mAh%20(Gold)-info

This battery is a unprotected 26650 battery, it does surpass the capacity specification.

DSC_3359

DSC_3361 DSC_3362

DSC_3363
DSC_3364

King%20Kong%20ICR26650%204200mAh%20(Gold)-Capacity

The cells does not track perfectly, it looks like it is a resistance difference and not a capacity difference.

King%20Kong%20ICR26650%204200mAh%20(Gold)-CapacityTimeHours

King%20Kong%20ICR26650%204200mAh%20(Gold)-CapacityTime

King%20Kong%20ICR26650%204200mAh%20(Gold)-Energy

King%20Kong%20ICR26650%204200mAh%20(Gold)-PowerLoadTime

King%20Kong%20ICR26650%204200mAh%20(Gold)-TripCurrent

These cells does easly deliver 15A

King%20Kong%20ICR26650%204200mAh%20(Gold)-Charge1-sep-2013 19:23



Conclusion

The capacity has been increased compared to the 4000mA (As expected), but not with 200mAh (The 4000mAh did also have more capacity than rated).
The cell has a good performance, but they have a slightly different voltage when loaded.
I will rate this battery as acceptable.



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

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

Ramblings
Ramblings's picture
Offline
Last seen: 3 months 5 days ago
Joined: 01/09/2013 - 04:05
Posts: 761
Location: Australia

Thanks!
Awesome as always! 

You are the light of the world. Like a city on a hill, you cannot be hidden.
People do not light a lamp and then hide it away, instead they put it where it gives lig

RaceR86
RaceR86's picture
Offline
Last seen: 5 years 8 months ago
Joined: 02/22/2012 - 08:32
Posts: 3777
Location: Norway

Thanks for releasing the results so quick HKJ!  Party

As far as I can tell this is the best 26650 you have tested so far? To me it looks that way, especially if high discharge, 5-10A, and high capacity is the goal. Do you agree?

The difference in discharge curves have been seen on several types of 26650 batteries it seems.

BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

HKJ
HKJ's picture
Offline
Last seen: 1 day 5 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark

RaceR86 wrote:
As far as I can tell this is the best 26650 you have tested so far? To me it looks that way, especially if high discharge, 5-10A, and high capacity is the goal. Do you agree?

As long as you want high capacity, yes, but for high voltage and current the Sony and Efest do also look good.

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

photon1k
photon1k's picture
Offline
Last seen: 4 years 7 months ago
Joined: 02/11/2011 - 23:29
Posts: 901
Location: Lotus Land, Canada

Thanks for doing this!

B42
B42's picture
Offline
Last seen: 8 months 1 day ago
Joined: 03/07/2013 - 21:03
Posts: 1876

Great review, thanks HKJ. Interesting that the capacity seems to be one of the highest in an IMR 26650

FMcamaroZ28
FMcamaroZ28's picture
Offline
Last seen: 8 months 2 days ago
Joined: 10/08/2012 - 09:05
Posts: 972
Location: New Jersey

What’s up with the sag of the second battery at 10a? (The orange line)

Is there something wrong with the cell?

HKJ
HKJ's picture
Offline
Last seen: 1 day 5 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark

FMcamaroZ28 wrote:
What's up with the sag of the second battery at 10a? (The orange line) Is there something wrong with the cell?

From 2A and upwards you can see an increasing distance between the discharge curves, this is due to a slight difference in internal resistance. I do not believe there is anything wrong with the cell, only some production tolerances.

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

garrybunk
garrybunk's picture
Offline
Last seen: 3 weeks 17 hours ago
Joined: 10/31/2011 - 09:25
Posts: 6098
Location: Johnstown, PA

Thanks HKJ!

-Garry

My Bike Lights Thread, Optics (TIR) Comparison Beamshots, Diffusion Techniques

, MTBR’s Lights & Night Riding Forum
NOTE: Now hosting my photos from my Google account. Post up if you can’t see them. Older photos hosted on Photobucket or Flickr may disappear (PM me if you want access to them).
neverfeltbetter
Offline
Last seen: 7 months 2 weeks ago
Joined: 05/13/2011 - 20:58
Posts: 46
HKJ wrote:

FMcamaroZ28 wrote:
What’s up with the sag of the second battery at 10a? (The orange line) Is there something wrong with the cell?

From 2A and upwards you can see an increasing distance between the discharge curves, this is due to a slight difference in internal resistance. I do not believe there is anything wrong with the cell, only some production tolerances.

That salmon curve is strange, never seen anything like that in your reviews. So change in internal resistance during discharge causes the voltage to oscillate like that ?

HKJ
HKJ's picture
Offline
Last seen: 1 day 5 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark

neverfeltbetter wrote:
That salmon curve is strange, never seen anything like that in your reviews. So change in internal resistance during discharge causes the voltage to oscillate like that ?

You are talking about the jumps in the curve?

I do not know what it is, but it might be something with the chemistry. It could also be a "loose" (We are talking about 1mOhm change, this does usual not qualify as a loose connection) connection in my battery clamp, but I have not moved the clamp between the curves and it is not present in the other curves (Or any of my other battery tests).

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

neverfeltbetter
Offline
Last seen: 7 months 2 weeks ago
Joined: 05/13/2011 - 20:58
Posts: 46
HKJ wrote:
You are talking about the jumps in the curve?

I do not know what it is, but it might be something with the chemistry. It could also be a “loose” (We are talking about 1mOhm change, this does usual not qualify as a loose connection) connection in my battery clamp, but I have not moved the clamp between the curves and it is not present in the other curves (Or any of my other battery tests).

Yes, exactly, there’s a sudden drop in voltage at 2,7Ah with a slight recovery around 3,1Ah and the same at 4,1 and 4,25Ah.
What a monday mystery.