Test/review of Hohm 18650 Work2 2547mAh (Black-white)

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,715
Location
Copenhagen, Denmark
[size=+3]Hohm 18650 Work2 2547mAh (Black-white)[/size]

DSC_2413.jpg


Official specifications:
  • Capacity: 2547mAh
  • Max Charge Rate: 3.82A
  • Max Charge Voltage: 4.2V
  • Continuous Discharge Rate: 25.3A
  • Max 80oC | 3.2V cut-off: 35.8A
  • Pulse | Peak6: 42.4A
  • Cycle Life Retention: 500 Cycles (69%), 1000 (58%)
  • Chemistry Type: QSP Li-NMC

Hohm%2018650%20Work2%202547mAh%20(Black-white)-info.png












DSC_2410.jpg










Hohm%2018650%20Work2%202547mAh%20(Black-white)-Capacity.png


The specifications for the battery sound fine and the two cells match very nicely in the discharge curve, but a internal fuse blows at 15A discharge current

Hohm%2018650%20Work2%202547mAh%20%28Black-white%29-Temp-10.0.png


Hohm%2018650%20Work2%202547mAh%20%28Black-white%29-Temp-15.0.png


The battery is not hot on the outside when the fuse blows.

Hohm%2018650%20Work2%202547mAh%20(Black-white)-CapacityTimeHours.png


Hohm%2018650%20Work2%202547mAh%20(Black-white)-CapacityTime.png


Hohm%2018650%20Work2%202547mAh%20(Black-white)-Energy.png




[size=+3]Conclusion[/size]

The batteries looks fine at low current (That is 10A), but something is wrong with the current rating or the batteries. The overload fuse burns out way below rating.



[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
 

bcm00re

Newly Enlightened
Joined
Apr 1, 2020
Messages
49
Thanks for the review on these Hohm Tech batteries. Any chance you a review of their Hohm Tech Base 4 charger in your queue? If so, I am particularly curious to hear about their "Battery Doctor" mode and how it compares to the repair/restore function of other chargers.
 

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,715
Location
Copenhagen, Denmark
Any chance you a review of their Hohm Tech Base 4 charger in your queue? If so, I am particularly curious to hear about their "Battery Doctor" mode and how it compares to the repair/restore function of other chargers.

I only got the more simple chargers from them for review.
 
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