Test/Review of Efest IMR16340 550mAh (red) 2014

Efest IMR16340 550mAh (red) 2014




Official specifications:

  • Size: 16340.
  • Type: Li-Mn (High Drain)
  • Rated Capacity: 550mAh
  • Nominal Voltage: 3.7V
  • Peak Voltage: 4.2V
  • Cut-off Voltage: 3.0V
  • Dimensions: 16.41mm (Diameter) x 34mm (Length)
  • Rechargeable: Yes
  • Style: Flat Top




This is a small high current battery.










The battery works fine up to 2A, but above that the cells has problems.















Conclusion

This is fairly standard performance for a good 16340 IMR cell



Notes and links

The batteries was supplied by Efest 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
Comparison to other LiIon batteries

Thanks for the review.

Thanks for the great reviews!

always appreciated

0.70 Ohm must be a typo

No, but it is because it is calculated between 6A and 7A where the curve drops and I always uses the worst value from the two tested batteries.

Thank you for the review.
The previous Efest IMR16340 you tested were version 2 and they seem to perform better at the 2A.
So these V.1 look like they have similar performance to the Kinoko IMR16340 according to your comparator.
Btw, love the comparator, so very useful!