Test/review of Vapcell INR21700 4200mAh (Green) 2019

HKJ

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[size=+3]Vapcell INR21700 4200mAh (Green) 2019[/size]

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Official specifications:
  • Model: INR21700
  • Size: 20.5*70.2mm
  • Nominal voltage: 3.6V
  • End-of-charge voltage: 4.20V
  • End-of-discharge Voltage: 2.50V
  • Typical Capacity: 4200mAh (0.2C discharge)
  • Min capacity: 4000Ah (0.2C discharge)
  • Weight: Max: 70g
  • Internal resistance: Max: 11mOhm (AC 1kHz)
  • Standard Charge: 1500mA,CCCV 100mA cut-off
  • Charging Time: 4hours(standard charge)
  • Quick Charge Current: 3000mA
  • Max Continuous Discharge Current: 30A
  • Operating Temperature: Charging: 0°C ~ 45°C, Discharging: -20°C ~ 75°C
  • Storage: Temperature -5°C ~ 35°C, Humidity <75%RH
  • Standard environmental condition: Temperature: 23±5°C, Humidity: 45-75%RH

Vapcell%20INR21700%204200mAh%20(Green)%202019-info.png


This is a high current 21700 cell with good capacity.

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Vapcell%20INR21700%204200mAh%20(Green)%202019-Capacity.png


The two cells match perfectly, but the capacity is slight low.

Vapcell%20INR21700%204200mAh%20(Green)%202019-Temp-15.0.png


Vapcell%20INR21700%204200mAh%20(Green)%202019-Temp-20.0.png


Vapcell%20INR21700%204200mAh%20(Green)%202019-Temp-30.0.png


Something went wrong during my discharge and the B battery melted my battery holder, but as can be seen it did not get that hot (Temperature sensor is a bit slow to register temperature). The A battery got hot enough to stop the discharge.

Vapcell%20INR21700%204200mAh%20(Green)%202019-CapacityTimeHours.png


Vapcell%20INR21700%204200mAh%20(Green)%202019-CapacityTime.png


Vapcell%20INR21700%204200mAh%20(Green)%202019-Energy.png


Vapcell%20INR21700%204200mAh%20(Green)%202019-PowerLoadTime.png


Vapcell%20INR21700%204200mAh%20(Green)%202019-TripCurrent.png


Vapcell%20INR21700%204200mAh%20(Green)%202019-Charge.png




[size=+3]Conclusion[/size]

This is a good quality high current battery, but the 30A may be a bit optimistic for continuous discharge.



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

The batteries was supplied by Vapcell 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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