HKJ
(HKJ)
1
Eizfan IMR18650 2500mAh (Black-purple) 2018
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Official specifications:
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Capacity: 2500mAh
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Nominal voltage: 3.70V
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Standard charge: 1250mA, 4.20V, 50mA cut-off
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Fast charge: 4000mA, 4.20V, 100mA cut-off
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Maximum charge voltage: 4.20V
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Maximum charge current: 4000mA
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Standard discharge: 500mA
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End voltage (cut-off): 2.5V
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Maximum continuous discharge current: 40A
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Weight: Max 49.0g
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Operating temperature: Charge: 0°C ~ 50°C, Discharge: –20°C ~ 75°C
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Storage temperature: 1 month: -°C ~ 60°C, 3 months: –20°C ~ 45°C, 1 year: –20°C ~ 20°C
%202018/Eizfan%20IMR18650%202500mAh%20(Black-purple)%202018-info.png)
This is a high current 18650 battery with moderate capacity.
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Nice graphic on the box, it shows the key specifications .
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%202018/Eizfan%20IMR18650%202500mAh%20(Black-purple)%202018-Capacity.png)
The discharge curves matches nicely and the battery handles up to 20A without much capacity loss
%202018/Eizfan%20IMR18650%202500mAh%20(Black-purple)%202018-Temp-15.0.png)
%202018/Eizfan%20IMR18650%202500mAh%20(Black-purple)%202018-Temp-20.0.png)
%202018/Eizfan%20IMR18650%202500mAh%20(Black-purple)%202018-Temp-30.0.png)
%202018/Eizfan%20IMR18650%202500mAh%20(Black-purple)%202018-CapacityTimeHours.png)
%202018/Eizfan%20IMR18650%202500mAh%20(Black-purple)%202018-CapacityTime.png)
%202018/Eizfan%20IMR18650%202500mAh%20(Black-purple)%202018-Energy.png)
%202018/Eizfan%20IMR18650%202500mAh%20(Black-purple)%202018-PowerLoadTime.png)
%202018/Eizfan%20IMR18650%202500mAh%20(Black-purple)%202018-TripCurrent.png)
%202018/Eizfan%20IMR18650%202500mAh%20(Black-purple)%202018-Charge.png)
Conclusion
This looks like a good high current cells.
Notes and links
The batteries was supplied by Eizfan (Efan) 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
HydrAxx
(HydrAxx)
2
Already tested by Mooch there is little more than a month, he himself hoped at least a rewrap of the Samsung INR18650-25S, but it is nothing, a simple and poor Samsung 25R5, it is lamentable and shameful from Eizfan.
The link to the test of this same cell by Mooch:
