Test/review of Hohm 21700 Run 3023mAh (Black-white)

HKJ

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[size=+3]Hohm 21700 Run 3023mAh (Black-white)[/size]

DSC_2758.jpg


Official specifications:
  • Capacity: 3023mAh
  • Max Charge Rate: 5.29A
  • Continuous Discharge Rate: 39.1A
  • Max @ 80oC | 3.2V cut-off: 49.5A
  • Pulse | Peak: 56.4A (<=5 SEC ON >=30 SEC OFF)
  • Cycle Life Retention: 500 Cycles (73%), 1000 (64%)
  • Chemistry Type: QSP Li-NMC

Hohm%2021700%20Run%203023mAh%20(Black-white)-info.png


This is a low capacity and very high current 21700 cell.







DSC_2756.jpg


DSC_2759.jpg
DSC_2760.jpg



DSC_2761.jpg

DSC_2762.jpg

DSC_2763.jpg


Hohm%2021700%20Run%203023mAh%20(Black-white)-Capacity.png


The two cell do nearly match and can deliver at least 30A with a minor capacity loss.

Hohm%2021700%20Run%203023mAh%20(Black-white)-Temp-15.0.png


Hohm%2021700%20Run%203023mAh%20(Black-white)-Temp-20.0.png


Hohm%2021700%20Run%203023mAh%20(Black-white)-Temp-30.0.png


Hohm%2021700%20Run%203023mAh%20(Black-white)-CapacityTimeHours.png


Hohm%2021700%20Run%203023mAh%20(Black-white)-CapacityTime.png


Hohm%2021700%20Run%203023mAh%20(Black-white)-Energy.png


Hohm%2021700%20Run%203023mAh%20(Black-white)-PowerLoadTime.png


Hohm%2021700%20Run%203023mAh%20(Black-white)-TripCurrent.png


Hohm%2021700%20Run%203023mAh%20(Black-white)-Charge.png


Discharge-Hohm%2021700%20Run%203023mAh%20%28Black-white%29-pulse-1.0%2010%2010-IR.png



[size=+3]Conclusion[/size]

The batteries can deliver a lot of current, but capacity is in the low end for 21700 cells. I.e. these cells are mostly interesting if there is a need for very high current.



[size=+3]Notes and links[/size]

The batteries was supplied by Hohmtech 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
Graphical comparison to 18650 and other batteries
Table with all tested LiIon batteries
 
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