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

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


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

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: