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

HKJ

Well-known member
Joined
Mar 26, 2008
Messages
9,691
[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

Well-known member
Joined
Mar 26, 2008
Messages
9,691
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.
 
Top