Test/review of Eizfan IMR18650 2500mAh (Black-purple) 2018

HKJ · 2019-01-01T16:25:27.000Z

Eizfan IMR18650 2500mAh (Black-purple) 2018

Official specifications:

Capacity: 2500mAh
Nominal voltage: 3.70V
Standard charge: 1250mA, 4.20V, 50mA cut-off
Fast charge: 4000mA, 4.20V, 100mA cut-off
Maximum charge voltage: 4.20V
Maximum charge current: 4000mA
Standard discharge: 500mA
End voltage (cut-off): 2.5V
Maximum continuous discharge current: 40A
Weight: Max 49.0g
Operating temperature: Charge: 0°C ~ 50°C, Discharge: –20°C ~ 75°C
Storage temperature: 1 month: -°C ~ 60°C, 3 months: –20°C ~ 45°C, 1 year: –20°C ~ 20°C

This is a high current 18650 battery with moderate capacity.

Nice graphic on the box, it shows the key specifications .

The discharge curves matches nicely and the battery handles up to 20A without much capacity loss

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 · 2019-01-02T17:18:28.000Z

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:

E-Cigarette Forum

Bench Test Results: Eizfan 40A 2500mAh 18650...hugely overrated, appears to...

These tests below only note the ESTIMATED ratings for these batteries at the time I tested them. Any battery that is not a genuine Samsung, Sony, Murata, LG, Panasonic, Molicel, or Sanyo can change at any time! This is one of the hazards of using...