Test/Review of Basen 18350 700mAh BS186I (Black)

Basen 18350 700mAh BS186I (Black)

Official specifications:

  • Type: BS186I (High Drain)
  • Capacity: 700mAh
  • Voltage: 3.7V
  • Style: Flat top
  • Protected: No
  • Max.discharge current: 10A
  • Weight: 21±1g
  • Size: Diameter: 18.00mm; Length: 34.73mm

This is supposed to be a high current 18350 battery, it might not be perfect in that regard, but it has a lot of capacity.

The battery can deliver 5A, but not 10A. I wonder about the different in the two lowest current traces, there is a capacity different, but that difference disappears in the 0.5A to 5A range.


The battery has a good capacity and can deliver a lot of current, but being unprotected and with small differences in capacity it is best not to use it them series.

Notes and links

The batteries was supplied by Basen for a 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