Test/review of Shockli 21700 4550mAh (Purple) 2018

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HKJ
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Test/review of Shockli 21700 4550mAh (Purple) 2018

Shockli 21700 4550mAh (Purple) 2018

DSC_9520

Official specifications:


  • Nominal voltage: 3.7V
  • Nomimal capacity: 4550mAh
  • Maximum continuous current: 22A

Shockli%2021700%204550mAh%20(Purple)%202018-info

High capacity and high current in the new 21700 format from Shockli.

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Shockli%2021700%204550mAh%20(Purple)%202018-Capacity

The two batteries are matching very fine and can handle up to 20A. They cannot deliver full capacity to 2.8V, but maybe to a lower voltage.

Shockli%2021700%204550mAh%20(Purple)%202018-Temp-15.0

Shockli%2021700%204550mAh%20(Purple)%202018-Temp-20.0

The batteries gets fairly warm at 20A

Shockli%2021700%204550mAh%20(Purple)%202018-Temp-30.0

And I had to stop at 30A

Shockli%2021700%204550mAh%20(Purple)%202018-CapacityTimeHours

Shockli%2021700%204550mAh%20(Purple)%202018-CapacityTime

Shockli%2021700%204550mAh%20(Purple)%202018-Energy

Shockli%2021700%204550mAh%20(Purple)%202018-PowerLoadTime

Shockli%2021700%204550mAh%20(Purple)%202018-TripCurrent

Shockli%2021700%204550mAh%20(Purple)%202018-Charge



Conclusion

The batteries has lot of capacity and can deliver fairly high current, it looks like good batteries.



Notes and links

The battery was supplied by shockli.com 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/

Agro
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Better power delivery than Liitokala Lii-40A with ~300 mAh more? Looks good!

will34
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Thanks for the review

shadockan
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I do not know if I’m right, but I think it’s some Samsung …..
But the negative one puts me in thoughts …

Thank you Henrik.

EasyB
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Looks like a great cell. High energy density (215 Wh/kg at 1A) and good discharge capability.

It’s not a Samsung 40T, based on this test:
https://www.e-cigarette-forum.com/threads/bench-re-retest-results-samsun...

The 40T has less capacity and a lower IR.

DavidEF
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Why is 20A still considered to be “high discharge” for a 21700? I thought we were already getting better than that with some 18650 cells. This does seem to be a good cell overall, but I don’t understand calling it “high discharge” in this context.

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
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HKJ
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DavidEF wrote:
Why is 20A still considered to be “high discharge” for a 21700? I thought we were already getting better than that with some 18650 cells. This does seem to be a good cell overall, but I don’t understand calling it “high discharge” in this context.

High discharge depends on how many C’s you discharge with, 2C is the (old) standard, when you get higher you are getting into high discharge, I do usual not call 3C or 4C high discharge, but much above that and it is high discharge.

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

firedome
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Nice review, thanks! Thumbs Up

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DavidEF
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HKJ wrote:
DavidEF wrote:
Why is 20A still considered to be “high discharge” for a 21700? I thought we were already getting better than that with some 18650 cells. This does seem to be a good cell overall, but I don’t understand calling it “high discharge” in this context.

High discharge depends on how many C’s you discharge with, 2C is the (old) standard, when you get higher you are getting into high discharge, I do usual not call 3C or 4C high discharge, but much above that and it is high discharge.


Okay, thanks! Good rule I guess. GradThumbs Up

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
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shadockan
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EasyB wrote:
Looks like a great cell. High energy density (215 Wh/kg at 1A) and good discharge capability.

It’s not a Samsung 40T, based on this test:
https://www.e-cigarette-forum.com/threads/bench-re-retest-results-samsun...

The 40T has less capacity and a lower IR.

Yes.
You’re right .
But with mAh’s is a great story as we talk about Chinese batteries …

Looking at the discharge image, I saw similarity to Samsung’s footprint …. in general ….

Of course, Lishen’s construction is not excluded, as the positive and negative poles look very much like Lishen 4000 (Basen 4000, Liitokalla 4000 ….)

toobadorz
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shadockan wrote:
Of course, Lishen’s construction is not excluded, as the positive and negative poles look very much like Lishen 4000 (Basen 4000, Liitokalla 4000 ….)

Well, you are probably right. Besides the well-known 4000mAh LR2170SA (the cell used in LiitoKala Lii-40A), LISHEN also offers another model called LR2170SF. This appears to be the cell used in this Shockli, so I have ordered some LR2170SF from a China dealer to try out…

EasyB
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toobadorz wrote:
shadockan wrote:
Of course, Lishen’s construction is not excluded, as the positive and negative poles look very much like Lishen 4000 (Basen 4000, Liitokalla 4000 ….)

Well, you are probably right. Besides the well-known 4000mAh LR2170SA (the cell used in LiitoKala Lii-40A), LISHEN also offers another model called LR2170SF. This appears to be the cell used in this Shockli, so I have ordered some LR2170SF from a China dealer to try out…


I could not find any info about particular cells on the lishen website. Could you post the relevant pages with info about the lishen cells? Thanks.
toobadorz
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EasyB wrote:
toobadorz wrote:
shadockan wrote:
Of course, Lishen’s construction is not excluded, as the positive and negative poles look very much like Lishen 4000 (Basen 4000, Liitokalla 4000 ….)

Well, you are probably right. Besides the well-known 4000mAh LR2170SA (the cell used in LiitoKala Lii-40A), LISHEN also offers another model called LR2170SF. This appears to be the cell used in this Shockli, so I have ordered some LR2170SF from a China dealer to try out…


I could not find any info about particular cells on the lishen website. Could you post the relevant pages with info about the lishen cells? Thanks.

I could not find any either, and that’s why I ordered some to try.