Test/Review of Keeppower IMR18350 (Black)

Batteries and Chargers Rechargeable Batteries
1

Keeppower IMR18350 (Black)







Official specifications:

  • Product Name: KP IMR 18350 3.7V Electronic Cigarette Battery

  • Brand: Keeppower

  • Model: 18350

  • Typical Capacity: 750mAh

  • Normal Voltage: 3.7V

  • Charge Method: constant voltage with limited current

  • Standard Charge Current: 500mA

  • Fast Charge Current: 700mA

  • Max. Plus Discharge Current: 15.0A

  • Max. Constant Discharge Current: 8.0A

  • Full Charged Voltage: 4.2V

  • Discharge Cut Off Voltage: 2.5V

  • Weight: 21.0±0.5g

  • Size: 18.50mm(D)X35.00mm(H)




Keeppower usual has good cells under their wrapper, do this high current 18350 cells I bought from banggood live up to that?










Up to 7A the curves has good tracking, the 10A is a bit compromised and 15A is way to high. This looks very reasonable for a 8A cell.



A 15C temperature raise, this is perfectly acceptable.



The 20C raise is not a proble either.



At 15A the cell collapses too fast to get hot (But it I had keep the load on it likely have given problems).















Conclusion

The cell has good high current performance, this also means the capacity is not in top.



Notes and links

This test was done while I was adjusting how to record traces from my 4-terminal system, that is the reason for the tail on one curve and not one the other in the 10A trace.

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
2

Thanks again for another great review. These are my favorite and go to 18350 cells. They are on par and sometimes gives my lights a few extra lumens vs the purple efest.

3

Thanks again for the excellent review @HKJ.
I have quite a few of these cells as they are often available with discount codes or coupons from BG, GB, etc.

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AWESOME review as always HKJ. I was waiting for this review. They do seem to be a pretty good cell.
I buy most (99%) of my battery purchases based off of your testing of batteries. A BIG thank you for all that you do. :beer:

Shawn

5

Not know much about the 18350 , but between Efest - MXJO …. and other batteries of this size , I think that is the only reporting the actual performance capability .
Only the AW I have seen be worth the money one pays .

With batteries of this size , you can not have great demands in mAh and Amperes and only the AW and Keeppower saw that deserve their money ……