Test/Review of Aucooma IMR18650 3000mAh (Black-red)

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HKJ
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Test/Review of Aucooma IMR18650 3000mAh (Black-red)

Aucooma IMR18650 3000mAh (Black-red)
DSC_4215
Official specifications:


  • Nominal Capacity: 3000mAh
  • Nominal Voltage: 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 35A, End voltage(Cut off) 2.5V
  • Max. Discharge Current: For continuous discharge 20A, Max discharge 35A
  • Weight: Approx. Max. 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)18.2 + 0.2/-0.3 mm, (H) 64.85 ± 0

Aucooma%20IMR18650%203000mAh%20(Black-red)-info
This is high current and high capacity cells.
DSC_4213 DSC_4214
DSC_4216 DSC_4217
DSC_4218
DSC_4219
DSC_4220
Aucooma%20IMR18650%203000mAh%20(Black-red)-Capacity
The discharge curves tracks very well and the cell is good at handling current, but they do get very hot at 20A current.
Aucooma%20IMR18650%203000mAh%20(Black-red)-Temp-10.0
Remember this is temperature raise, to get the cell temperature somewhere between 25°C and 30°C must be added.
Aucooma%20IMR18650%203000mAh%20(Black-red)-Temp-15.0
Aucooma%20IMR18650%203000mAh%20(Black-red)-Temp-20.0
At 20A the cells reach 85°C and I stop the test.
Aucooma%20IMR18650%203000mAh%20(Black-red)-Temp-30.0
At 30A the cells reach 85°C much faster, after I stopped the test my sensor reached 92°C
Aucooma%20IMR18650%203000mAh%20(Black-red)-CapacityTimeHours
Aucooma%20IMR18650%203000mAh%20(Black-red)-CapacityTime
Aucooma%20IMR18650%203000mAh%20(Black-red)-Energy
Aucooma%20IMR18650%203000mAh%20(Black-red)-PowerLoadTime
Aucooma%20IMR18650%203000mAh%20(Black-red)-TripCurrent
Aucooma%20IMR18650%203000mAh%20(Black-red)-Charge
Conclusion
The cells has good capacity and can deliver a lot of current, but high current is best done in pulses to keep the temperature down.
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/

MRsDNF
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Thanks HKJ. 92°C, that is hot.

 

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Henk4U2
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Thank you for another thourougly conducted series of tests and review.
Apparently there are more things in heaven and earth, Horatio, than just the Big Names Wink
A quick look in your comparator reveals that the results of this battery are almost identical to those the Samsung 30Q.

You are a flashaholic if you are forced to come out of the closet, to make room for more flashlights.

Tom E
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Thanks HKJ! Yes, dead ringer on the discharge curves with a 30Q at every level.