Test/Review of Kinoko IMR18350 850mAh (Gray)

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HKJ
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Test/Review of Kinoko IMR18350 850mAh (Gray)

Kinoko IMR18350 850mAh (Gray)

DSC_3895

Official specifications:

  • Brand: Kinoko
  • Nominal Voltage : 3.7V
  • Capacity : 850mAH
  • Lowest Discharge Voltage : 2.50V
  • Standard Charge : CC/CV ( max. charging rate 1.5A )
  • Cycle Life : > 500 cycles
  • Weight: 28g
  • Diamter: 18.18mm
  • Length: 34.65mm


Kinoko%20IMR18350%20850mAh%20(Gray)-info

This is a 18350 IMR cell, i.e. it has the same diameter as 18650 batteries and the length of CR123 cells.

DSC_3894

DSC_3896 DSC_3897

DSC_3898
DSC_3899

Kinoko%20IMR18350%20850mAh%20(Gray)-Capacity

The cell works fine up to about 3A and the capacity does track fairly well.

Kinoko%20IMR18350%20850mAh%20(Gray)-CapacityTimeHours

Kinoko%20IMR18350%20850mAh%20(Gray)-CapacityTime

Kinoko%20IMR18350%20850mAh%20(Gray)-Energy

Kinoko%20IMR18350%20850mAh%20(Gray)-PowerLoadTime

Kinoko%20IMR18350%20850mAh%20(Gray)-TripCurrent

Kinoko%20IMR18350%20850mAh%20(Gray)-Charge



Conclusion

Good capacity and good current handling, this is good batteries.
The rating can only be acceptable, because they are from a new and unspecified brand.



Notes and links

The batteries was supplied by Illuminationsupply 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
Comparison to other LiIon batteries

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

Edited by: HKJ on 11/15/2013 - 12:09
tallboybass
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My favorite battery for the RRT01!

ryansoh3
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Lovely, thanks for the tests!

These look very promising. Smile

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totilde
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Having half the volume of a 18650, isn’t the capacity a bit low?

Mooooooo

ryansoh3
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totilde wrote:
Having half the volume of a 18650, isn’t the capacity a bit low?

This is an IMR cell, and 18650 IMR’s, such as the one from AW has approximately the double capacity of this one, so it’s a chemistry thing.

I haven’t seem any good ICR 18350’s though. :~

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totilde
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ryansoh3 wrote:
totilde wrote:
Having half the volume of a 18650, isn’t the capacity a bit low?

This is an IMR cell, and 18650 IMR’s, such as the one from AW has approximately the double capacity of this one, so it’s a chemistry thing.

I haven’t seem any good ICR 18350’s though. :~


Oh, didn’t notice that, sorry

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leaftye
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tallboybass wrote:
My favorite battery for the RRT01!

I'm getting both today.  Smile

The low mode should be lower.

HKJ
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totilde wrote:
Having half the volume of a 18650, isn't the capacity a bit low?

That can be discussed. High capacity 18650 is made by the best LiIon factories in the world and the technology is constantly updated. The size is also made in extremely high numbers.

All other sizes is made in much smaller numbers and a lot of sizes are only made by second rate factories. These factories may do their best, but they do not have access to the top rate technology.

I.e. you will not see top capacities in anything but 18650.

This cell is doing fairly well for an IMR cell, either it is a perfectly made LiMn cell or they have used some of the chemistry improvements on it.

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

NightCrawl
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ryansoh3 wrote:
totilde wrote:
Having half the volume of a 18650, isn't the capacity a bit low?
This is an IMR cell, and 18650 IMR's, such as the one from AW has approximately the double capacity of this one, so it's a chemistry thing. I haven't seem any good ICR 18350's though. :~

There are 3 decent cells in that size, protected and good for 2A (you should use IMRs if you want more current than 2A anyways):

http://dampfakkus.de/akkuvergleich.php?akku1=363&akku2=165&akku3=203&akk...

ryansoh3
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NightCrawl wrote:

ryansoh3 wrote:
totilde wrote:
Having half the volume of a 18650, isn’t the capacity a bit low?
This is an IMR cell, and 18650 IMR’s, such as the one from AW has approximately the double capacity of this one, so it’s a chemistry thing. I haven’t seem any good ICR 18350’s though. :~

There are 3 decent cells in that size, protected and good for 2A (you should use IMRs if you want more current than 2A anyways):

http://dampfakkus.de/akkuvergleich.php?akku1=363&akku2=165&akku3=203&akk...

Thanks for the info.

Unfortunately they have similar capacities to this IMR cell, so in essence, this Kinoko IMR cell both provides 800-900mAh even at high currents, while the ICR cells’ performance drops at high current (even seen at 2A).

As HKJ stated, I don’t there are 18350’s with 1500-1700mAh capacity (half of the top tier 18650 cells) simply due to the lack of demand and technology. :~

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leaftye
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Capacity can't be half of an 18650.  The space required at the ends is the same no matter how long the cells are.

 

I wouldn't be surprised if there's a shift away from 18650's in the coming years.  Tablets don't use them, and they're eating into sales of laptops, and will continue to do so now that they're becoming quite powerful and there are hybrid tablets now too.  Actually, the hybrid tablets are more of a return to the format brought about with the TC1000...  The big variable will be electric cars.  If they had the clout to influence development and production of lithium ion cells, would they prefer a different cell type?

The low mode should be lower.

HKJ
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leaftye wrote:
The big variable will be electric cars.  If they had the clout to influence development and production of lithium ion cells, would they prefer a different cell type?

I do believe that Tesla has a lot of influence on LiIon batteries, they do buy a lot of them.

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

ryansoh3
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leaftye wrote:

Capacity can’t be half of an 18650.  The space required at the ends is the same no matter how long the cells are.

That’s true, but should be closer to half, not to a quarter of it. (In my perfect world. Wink )

I’m genuinely surprised the Model S is using thousands of 18650’s as apposed to li-po packs, just like in modern laptops.

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leaftye
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HKJ wrote:

leaftye wrote:
The big variable will be electric cars.  If they had the clout to influence development and production of lithium ion cells, would they prefer a different cell type?

I do believe that Tesla has a lot of influence on LiIon batteries, they do buy a lot of them.

I would think the same, but I suspect they're wary after the trouble with Fisker/A123.

The low mode should be lower.

Tom E
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The resistance looks exceptionally high for an IMR cell. At 0.16 it's 4 times higher than a Samsung INR 20R. Looks like the AW and Efest 18350 IMR's do much better, below 0.10.

ryansoh3
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Tom E wrote:

The resistance looks exceptionally high for an IMR cell. At 0.16 it’s 4 times higher than a Samsung INR 20R. Looks like the AW and Efest 18350 IMR’s do much better, below 0.10.

Good catch.
Do the discharge graphs reflect the relatively high IR?

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HKJ
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Tom E wrote:
The resistance looks exceptionally high for an IMR cell. At 0.16 it's 4 times higher than a Samsung INR 20R. Looks like the AW and Efest 18350 IMR's do much better, below 0.10.

It is important to remember that I measure the Ri at high current, usual it is better to compare the discharge charts.

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

Tom E
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Yes - comparing the AW IMR against this Kinoko at 3A shows the AW is clearly better, and the Efest is better too. All I care about is high amps (Smile) and that's where internal resistance is critical.

Respectfully, for higher amps usage, I would stay clear of these cells.

HKJ
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Tom E wrote:

Yes - comparing the AW IMR against this Kinoko at 3A shows the AW is clearly better, and the Efest is better too. All I care about is high amps (Smile) and that's where internal resistance is critical.

Respectfully, for higher amps usage, I would stay clear of these cells.

Yes, you get higher voltage from AW or Efest, but also slightly less capacity.

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

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Yes - the 850 capacity is nice bout these. Only 350's you've tested that's higher are the XTAR's, but they have that weird initial drop in voltage - not good for XM-L2 single cell high amp applications I would think.

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I have a couple of MT-G2 direct drive P60 dropins. These Kinoko 18350’s work perfectly providing about 5 amps without killing the led. AW’s 18350 killed one in about 5 seconds. So maybe a little internal resistance is a good thing sometimes. I bought eight of these about a month ago and have been very happy with them. I’ve run a few to cut off and they do hold voltage close together to the very end.