Test/review of Keeppower INR21700 4000mAh NH2140 (Black) 2019

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HKJ
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Test/review of Keeppower INR21700 4000mAh NH2140 (Black) 2019

Keeppower INR21700 4000mAh NH2140 (Black) 2019
DSC_6822
Official specifications:


  • Capacity min.: 3900mAh
  • Capacity typ.: 4000mAh
  • Nominal voltage: 3.70V
  • Charge voltage: 4.20+/-0.05V
  • Standard discharge cut-off voltage: 2.50V
  • Standard charge current: 2000mA
  • Charge termination current: 200mA
  • Max. continuous discharge current: 35A
  • Max. pulse discharge current: 45A

Keeppower%20INR21700%204000mAh%20NH2140%20(Black)%202019-info
This is a high current cell with good capacity in the 21700 size.
DSC_6821
DSC_6823 DSC_6824
DSC_6825
DSC_6826
Keeppower%20INR21700%204000mAh%20NH2140%20(Black)%202019-Capacity
The two cell tracks very nicely, they do get hot at 30A continuous.
Keeppower%20INR21700%204000mAh%20NH2140%20(Black)%202019-Temp-15.0
Keeppower%20INR21700%204000mAh%20NH2140%20(Black)%202019-Temp-20.0
Keeppower%20INR21700%204000mAh%20NH2140%20(Black)%202019-Temp-30.0
Keeppower%20INR21700%204000mAh%20NH2140%20(Black)%202019-CapacityTimeHours
Keeppower%20INR21700%204000mAh%20NH2140%20(Black)%202019-CapacityTime
Keeppower%20INR21700%204000mAh%20NH2140%20(Black)%202019-Energy
Keeppower%20INR21700%204000mAh%20NH2140%20(Black)%202019-PowerLoadTime
Keeppower%20INR21700%204000mAh%20NH2140%20(Black)%202019-TripCurrent
Keeppower%20INR21700%204000mAh%20NH2140%20(Black)%202019-Charge
Keeppower%20INR21700%204000mAh%20NH2140%20%28Black%29%202019-Pulse-1A-10-10-2.5V-IR
Conclusion
These cells are good high current cells with very low internal resistance and a good amount of capacity.
Notes and links
The battery was supplied by Keeppower 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/

Superstocker
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Last seen: 6 hours 1 min ago
Joined: 11/28/2018 - 21:22
Posts: 126
Location: United States, Virginia

Thanks HKJ! Looks like the Samsung 40T.