Test/review of Enercig 20700 4000mAh EC-27B (Red)

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HKJ
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Test/review of Enercig 20700 4000mAh EC-27B (Red)

Enercig 20700 4000mAh EC-27B (Red)

DSC_1832

Official specifications:


  • Typical capacity: 4250mAh
  • Minium capacity: 4000mAh
  • Weight:60g ±3g
  • Diameter: 20.35 mm ±0,1 mm
  • Length: 70.30 mm ±0,25 mm
  • Nominal voltage: 3,6 Volt
  • Charge termination: 4,20 Volt ±0,05 Volt
  • Discharge termination: 2,50 Volt
  • Maximum charge current: 4,0 A (1C)
  • Maximum continious discharge current: 15A (5C)


Enercig%2020700%204000mAh%20EC-27B%20(Red)-info

This is very good discharge curves, they track perfectly. The rated 15A discharge current looks very reasonable.

DSC_1831

DSC_1833DSC_1834

DSC_1835
DSC_1836
DSC_1837

Enercig%2020700%204000mAh%20EC-27B%20(Red)-Capacity


Enercig%2020700%204000mAh%20EC-27B%20(Red)-Temp-10.0

Enercig%2020700%204000mAh%20EC-27B%20(Red)-Temp-15.0

Enercig%2020700%204000mAh%20EC-27B%20(Red)-Temp-20.0

At 20A the cell gets too hot and I had to stop the discharge.

Enercig%2020700%204000mAh%20EC-27B%20(Red)-CapacityTimeHours

Enercig%2020700%204000mAh%20EC-27B%20(Red)-CapacityTime

Enercig%2020700%204000mAh%20EC-27B%20(Red)-Energy

Enercig%2020700%204000mAh%20EC-27B%20(Red)-PowerLoadTime

Enercig%2020700%204000mAh%20EC-27B%20(Red)-TripCurrent

Enercig%2020700%204000mAh%20EC-27B%20(Red)-Charge



Conclusion

This size has more capacity and slightly higher voltage than 18650, without being much larger.
The cell is a very good.



Notes and links

The batteries was supplied by ENERDan 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/