Vapcell INR21700 4500mAh (Red) 2019



Official specifications:
  • Model: INR21700
  • Size: 21.5*70.8mm
  • Nominal voltage: 3.60V
  • End-of-charge voltage: 4.20V
  • End-of-discharge Voltage: 2.50v
  • Typical Capacity: 4500mAh (0.2C discharge)
  • Min capacity: 4400mAh (0.2C discharge)
  • Weight: Max:72g
  • Internal resistance: Max:15mOhm
  • Standard Charge: 1500mA, CCCV 100mA cut-off
  • Quick Charge Current: 3000mA
  • Max Continuous Discharge Current: 20A
  • Operating Temperature: Charging: 0C ~ 45C, Discharging: -20C~75C
  • Storage Temperature -5C~35C
  • Storage Humidity: <75%RH




This is a high current battery in 21700 size with good capacity.











The two tracks matches fairly well and capacity only goes down slowly with load.





















Conclusion

This looks like a good battery, it can handle a fairly high current and has good capacity.



Notes and links

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
Graphical comparison to 26650 and other larger batteries
Table with all tested LiIon batteries