Test/review of Keeppower IMR20700 4250mAh UH2042 (Black) 2017

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Test/review of Keeppower IMR20700 4250mAh UH2042 (Black) 2017

Keeppower IMR20700 4250mAh UH2042 (Black) 2017

DSC_2652

Official specifications:


  • Part No.: UH2042
  • High Drain 20700 Li-ion Rechargeable Battery
  • Minimum Capacity: 4050mAh
  • Typical Capacity: 4250mAh
  • Normal Voltage: 3.7V
  • Standard Continuous Charging Current: 1000mA
  • Maximum Continuous Charging Current: 2000mA
  • Maximum Continuous Discharging Current: 15A
  • Maximum Pulse Discharging Current: 30A
  • 4.2V full charged voltage and 2.5V discharge cut off voltage
  • High charge and discharge currents reduce cycle life

Keeppower%20IMR20700%204250mAh%20UH2042%20(Black)%202017-info

A high capacity cell in the new 20700 form factor.


DSC_2651

DSC_2653DSC_2654

DSC_2655
DSC_2656

Keeppower%20IMR20700%204250mAh%20UH2042%20(Black)%202017-Capacity

The discharge curves tracks fine, the capacity is present at low load, but at higher loads the cell has a bit less capacity.

Keeppower%20IMR20700%204250mAh%20UH2042%20(Black)%202017-Temp-10.0

Keeppower%20IMR20700%204250mAh%20UH2042%20(Black)%202017-Temp-15.0

At 15A the cell gets rather warm.

Keeppower%20IMR20700%204250mAh%20UH2042%20(Black)%202017-Temp-20.0

At 20A it gets too hot and i had to stop.

Keeppower%20IMR20700%204250mAh%20UH2042%20(Black)%202017-CapacityTimeHours

Keeppower%20IMR20700%204250mAh%20UH2042%20(Black)%202017-CapacityTime

Keeppower%20IMR20700%204250mAh%20UH2042%20(Black)%202017-Energy

Keeppower%20IMR20700%204250mAh%20UH2042%20(Black)%202017-PowerLoadTime

Keeppower%20IMR20700%204250mAh%20UH2042%20(Black)%202017-TripCurrent

Keeppower%20IMR20700%204250mAh%20UH2042%20(Black)%202017-Charge



Conclusion

This looks like a very good cell with good capacity for its size.



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
Compare to 18650 and other batteries

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