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

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

Evva 21700 5000mAh (Black-silver) 2021
DSC_4315
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
This is a high capacity 21700 cell with protection.
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DSC_4316 DSC_4317
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Evva%2021700%205000mAh%20(Black-silver)%202021-Capacity
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
Evva%2021700%205000mAh%20(Black-silver)%202021-Temp-10.0
Evva%2021700%205000mAh%20(Black-silver)%202021-Temp-15.0
Evva%2021700%205000mAh%20(Black-silver)%202021-CapacityTimeHours
Evva%2021700%205000mAh%20(Black-silver)%202021-CapacityTime
Evva%2021700%205000mAh%20(Black-silver)%202021-Energy
Evva%2021700%205000mAh%20(Black-silver)%202021-Charge
Discharge-Evva%2021700%205000mAh%20%28Black-silver%29%202021-pulse-1.0%2010%2010-IR
Conclusion
This is a good protected battery.
Notes and links
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

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

HKJ
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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.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

raccoon city
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HKJ wrote:

There was no data loss, I have up to the minute (more or less) backup.

Just curious...

What program do you use for practically constant backups?

HKJ
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raccoon city wrote:

HKJ wrote:

There was no data loss, I have up to the minute (more or less) backup.


Just curious…


What program do you use for practically constant backups?

The program that is included with my NAS server (Synology), but I would have preferred something where I could specify a minimum time, that would make it possible to maintain multiple generations of a file I work on.
One detail I really like about the backup program is that I can fetch latest generation file from the NAS server without any special software.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Superstocker
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HKJ wrote:
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.

Thanks for the review. It is much appreciated. Sorry for the trouble with your hard disk too.