Test/review of Vapcell INR21700 3100mAh (Purple)

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,715
Location
Copenhagen, Denmark
[size=+3]Vapcell INR21700 3100mAh (Purple)[/size]

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Official specifications:
  • Model: NCR21700
  • Size: 21.0*70.2mm
  • Nominal voltage: 3.6V
  • End-of-charge voltage: 4.20V
  • End-of-discharge Voltage: 2.50V
  • Typical Capacity: 3100mAh (0.2C discharge)
  • Min capacity: 3000mAh (0.2C discharge)
  • Weight: Max:68g
  • Internal resistance: Max:8mOhm
  • Standard Charge: 2000mA,CCCV 100mA cut-off
  • Charging Time: 3hours(standard charge)
  • Quick Charge Current: 4000mA
  • Max Continuous Discharge Current: 35000mA
  • Operating Temperature: Charging: 0°C ~ 45°C, Discharging: -20°C~70°C
  • Storage: Temperature -5°C~35°C, Humidity <75%RH
  • Standard environmental condition: Temperature: 23±5°C
  • Humidity: 45-75%RH

Vapcell%20INR21700%203100mAh%20(Purple)-info.png


One of the new slightly larger batteries, this one with fairly low capacity, but very high current capability.

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Vapcell%20INR21700%203100mAh%20(Purple)-Capacity.png


Good tracking, expect a small capacity difference. The batteries has nearly constant capacity op to 30A and the 35A rating looks very realistic.

Vapcell%20INR21700%203100mAh%20(Purple)-Temp-15.0.png


Vapcell%20INR21700%203100mAh%20(Purple)-Temp-20.0.png


Vapcell%20INR21700%203100mAh%20(Purple)-Temp-30.0.png


The cells do not get too warm at 30A discharge current.

Vapcell%20INR21700%203100mAh%20(Purple)-CapacityTimeHours.png


Vapcell%20INR21700%203100mAh%20(Purple)-CapacityTime.png


Vapcell%20INR21700%203100mAh%20(Purple)-Energy.png


Vapcell%20INR21700%203100mAh%20(Purple)-PowerLoadTime.png


Vapcell%20INR21700%203100mAh%20(Purple)-TripCurrent.png


Vapcell%20INR21700%203100mAh%20(Purple)-Charge.png




[size=+3]Conclusion[/size]

This is a good high current battery.



[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
Compare to 18650 and other batteries
 

SubLGT

Flashlight Enthusiast
Joined
Nov 18, 2013
Messages
1,183
Location
Idaho, USA
Discharge curves are very similar to the Samsung 21700-30T at 30A, but the Samsungs have closer capacity matching.
 

mjgsxr

Enlightened
Joined
Feb 17, 2013
Messages
385
Location
N Ireland
Hi HKJ

Do you think these are samsung 30t cells inside? Still can't find samsung 30T cells for sale, anyone else had better luck?
 
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