Test/review of Evva 21700 5000mAh (Black-silver) 2021

Wurkkos

HKJ

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Joined
Mar 26, 2008
Messages
9,712
Location
Copenhagen, Denmark
[size=+3]Evva 21700 5000mAh (Black-silver) 2021[/size]

DSC_4315.jpg


Official specifications:
  • Nominal Capacity: 5000mAh
  • Minimum Capacity: 4900mAh
  • Nominal Voltage: 3.6V
  • Standard Charge Voltage: 4.2±0.5VV
  • Standard Charge Current: 2A
  • Max. Charge Current: 4A
  • Protection Circuit: Built-in, with over charge, over discharge and short circuit protection
  • Std. Discharge Current: 5A
  • PCB Protection Trip Current: 15A
  • Discharge Cut-off Voltage: 2.50V
  • Dimension: (D)21.60mm*(H)75.60mm max.
  • Weight: 75g max.
  • Cell origin: A Grade Samsung 21700 cells
  • Operating Temperature: Charge: 0°C ~ 45°C, discharge: -20°C ~ 55°C


Evva%2021700%205000mAh%20(Black-silver)%202021-info.png


This is a high capacity 21700 cell with protection.

DSC_4314.jpg


DSC_4316.jpg
DSC_4317.jpg


DSC_4318.jpg

DSC_4319.jpg


Evva%2021700%205000mAh%20(Black-silver)%202021-Capacity.png


The two cells match very nicely and the protection kicks in at higher currents, but it is a bit slow to reconnect the output, i.e. it failed to reconnect during my automatic test and I did not get all the curves.

Evva%2021700%205000mAh%20(Black-silver)%202021-Temp-5.0.png


Evva%2021700%205000mAh%20(Black-silver)%202021-Temp-10.0.png


Evva%2021700%205000mAh%20(Black-silver)%202021-Temp-15.0.png


Evva%2021700%205000mAh%20(Black-silver)%202021-CapacityTimeHours.png


Evva%2021700%205000mAh%20(Black-silver)%202021-CapacityTime.png


Evva%2021700%205000mAh%20(Black-silver)%202021-Energy.png


Evva%2021700%205000mAh%20(Black-silver)%202021-Charge.png


Discharge-Evva%2021700%205000mAh%20%28Black-silver%29%202021-pulse-1.0%2010%2010-IR.png




[size=+3]Conclusion[/size]

This is a good protected battery.



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

The batteries was supplied by Eeva 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 21700 and other batteries
Table with all tested LiIon batteries
 

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,712
Location
Copenhagen, Denmark
Sorry about the long pause from my last review, I lost the harddisk with all my data on it and it took some time to get my computer back to normal. There was no data loss, I have up to the minute (more or less) backup.
 
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