Test/Review of Efest IMR18350 700mAh (Purple) BT 2014

Efest IMR18350 700mAh (Purple) BT 2014

Official specifications:

  • Weight: 28g
  • Length: 34.63mm
  • Diameter: 18.31 mm
  • Top: Nipple
  • Bottom: non-procted
  • Typical Capacity: 700mAh
  • Min capacity: 700mAh
  • Continuous Max. Discharging Current: 10.5A
  • Continuous Max. Charge Current: 2.15A
  • Cycle life: 300 times
  • Battery WH: 125WH\Kg
  • Discharge cut-off voltage: 3.0V
  • Voltage: 3.7V
  • Full Charge voltage: 4.2V
  • Temperature: dishcarge temperature range:-10°C—60°C, charge temperature range: 0°C—40°C
  • Storage: 1 year:-20°C—25°C, 3 months:-20°C—45°C, 1 month:-20°C—60°C

A button top high current 18350 cell, being 18350 and high current means low capacity (exactly the specified capacity).

The two cells is tracking fairly well and, as can be seen, deliver 10A. The voltage drop is significant at 10A, it is better to stay below 7A.
The flat top version is slightly better at high current.


This cell has very impressive high current capability, but do not get it if you want a lot of capacity.
It looks like a good 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

Last review in 2014.

I have add 7A and 10A tracks in the small cell comparator, it was necessary due to the many high current cells. All cells that have been tested at these current are available in it.

thanks ,great review as always.