Test/Review of Aucooma IMR18650 2800mAh (Purple-blue)

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Test/Review of Aucooma IMR18650 2800mAh (Purple-blue)

Aucooma IMR18650 2800mAh (Purple-blue)
DSC_4198
Official specifications:


  • Capacity Std. charge / discharge: 2800mAh
  • Nominal Voltage Average of Std. Discharge: 3.70V
  • Standard Charge: Constant current: 1250mA, Constant voltage: 4.20V, End current(Cut off): 50mA
  • Fast Charge: Constant current: 4000mA, Constant voltage: 4.20V, End current(Cut off): 100mA
  • Max. Charge Voltage: 4.20V
  • Max. Charge Current: 4000mA
  • Standard Discharge: Constant current: 500mA, End voltage(Cut off): 2.5V
  • Fast Discharge: Constant current: 25000mA, 40000mA, End voltage(Cut off): 2.5V
  • Max. Discharge Current: For continuous discharge: 25A, Max discharge: 40A
  • Weight Approx.: 47.0G
  • Operating Temperature: Charge: 0 ~ 50°C, Discharge: -20~ 75°C
  • Storage Temperature: 1 month: -20 ~ 60°C, 3 months: -20 ~45°C, 1 year: -20 ~ 20°C
  • Dimension: (D)18.33 ± 0.06mm, (H) 64.85± 0.17mm

Aucooma%20IMR18650%202800mAh%20(Purple-blue)-info
A battery with good capacity and high current ability.
DSC_4196 DSC_4197
DSC_4199 DSC_4200
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Aucooma%20IMR18650%202800mAh%20(Purple-blue)-Capacity
The discharge curves has very good tracking.
Aucooma%20IMR18650%202800mAh%20(Purple-blue)-Temp-15.0
At 15A the cell gets warm, but not too warm.
Aucooma%20IMR18650%202800mAh%20(Purple-blue)-Temp-20.0
At 20A the temperature is above 80°C
Aucooma%20IMR18650%202800mAh%20(Purple-blue)-Temp-30.0
The temperature at 30A reach about the same temperature as 20A, but my sensor do first see it after the discharge is finished.
Aucooma%20IMR18650%202800mAh%20(Purple-blue)-CapacityTimeHours
Aucooma%20IMR18650%202800mAh%20(Purple-blue)-CapacityTime
Aucooma%20IMR18650%202800mAh%20(Purple-blue)-Energy
Aucooma%20IMR18650%202800mAh%20(Purple-blue)-PowerLoadTime
Aucooma%20IMR18650%202800mAh%20(Purple-blue)-TripCurrent
Aucooma%20IMR18650%202800mAh%20(Purple-blue)-Charge
Conclusion
This looks like a good high current cell, but I would be a bit careful with 20A continuous, due to the high temperature.
Notes and links
The batteries was supplied by Aucooma for a 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): https://lygte-info.dk/