Test/review of TrustFire IMR21700 4000mAh (Black) 2019

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HKJ
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Test/review of TrustFire IMR21700 4000mAh (Black) 2019

TrustFire IMR21700 4000mAh (Black) 2019
DSC_4862
Official specifications:


  • Voltage: 3.7V
  • Capacity: 4000mAh
  • Cycle life: 1000 cycles

TrustFire%20IMR21700%204000mAh%20(Black)%202019-info
A 21700 high current cell from Trustfire.
DSC_4860 DSC_4861
DSC_4863 DSC_4864
DSC_4865
DSC_4866
DSC_4867
TrustFire%20IMR21700%204000mAh%20(Black)%202019-Capacity
The two cells are not matched very well, but maintain their capacity at just about any load.
TrustFire%20IMR21700%204000mAh%20(Black)%202019-Temp-15.0
TrustFire%20IMR21700%204000mAh%20(Black)%202019-Temp-20.0
The battery got hot and I stopped the test.
TrustFire%20IMR21700%204000mAh%20(Black)%202019-Temp-30.0
TrustFire%20IMR21700%204000mAh%20(Black)%202019-CapacityTimeHours
TrustFire%20IMR21700%204000mAh%20(Black)%202019-CapacityTime
TrustFire%20IMR21700%204000mAh%20(Black)%202019-Energy
TrustFire%20IMR21700%204000mAh%20(Black)%202019-PowerLoadTime
TrustFire%20IMR21700%204000mAh%20(Black)%202019-TripCurrent
TrustFire%20IMR21700%204000mAh%20(Black)%202019-Charge
Conclusion
The cells can deliver up to about 15A continuous and has a good amount of capacity.
Notes and links
The batteries was supplied by Trustfire 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

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