Test/Review of Imren IMR18650 3500mAh (Green)

Batteries and Chargers Rechargeable Batteries
1

Imren IMR18650 3500mAh (Green)



Official specifications:

  • Brand: IMREN
  • Weight: 50g
  • Capacity: 3500mAh
  • Length : 65.22mm
  • Diameter: 18.19mm
  • Voltage: 3.7V
  • Excellent high-current discharge performance
  • Model: 18650
  • Material: Li-Mn
  • Discharge rate: 30A




A high capacity and very high current cell from Imren.













The two cells are fairly close at low loads, at higher current they do not match as well.
During the 20A discharge the cells stops (Probably vents) and the output voltage is 0, no more testing was possible. The good thing is that the safety in the cell works, the bad is that these cell can never deliver 30A.







Due to the failed cells I could not make these charts.





Conclusion

The cells looks fine as high capacity cells, but they do not really handle high current.



Notes and links

The battery was supplied by Imren for a review.
Because Imren changed the wrapper after they shipped the batteries to me, the above pictures are taken by Imren.

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

2

Any thoughts as to what cell/s are under the wrapper?

This looks like a good example of rubbish/2nds/or maybe just over-specced cells being wrapped up in a fancy box & sold at a premium price.

3

Maybe LG INR18650MJ1, see discharge curve, capacity, positive terminal.
But LG MJ1 usually match a lot better than these IMREN cells, and discharge voltage is also quite a bit higher.

Funny, the same moment I read “3500mAh 30A” I knew what to expect…