Test/review of Sofirn 14500 900mAh (Black)

HKJ · 2018-05-20T15:51:06.000Z

Sofirn 14500 900mAh (Black)

Official specifications:

Capacity: 900mAh (milliamp-hour)
Recharge up to 1100 times; Pre-Charged in factory
No memory effect - batteries can be recharged when fully, or partially discharged

A 14500 LiIon battery from Sofirn.

There is capacity difference between the two cells and they are not the rated 900mAh, the best one is more like 800mAh

Conclusion

There is a significant capacity difference between the two cells, i.e. they cannot be used in series. Actual capacity is fairly normal for average quality batteries in this size.

Notes and links

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

MRsDNF · 2018-05-20T20:33:04.000Z

:+1: Thanks for the review HKJ.

MascaratumB · 2018-05-20T22:10:17.000Z

If I remember correctly, when I first got mine, there was also a difference in the top charging value, so this probably means there are fluctuations (inconsistency) among the same type of cells!

Thanks for the review HKJ :+1:

d_t_a · 2018-05-23T10:45:24.000Z

Thanks for the test, HKJ!

Perhaps Sofirn can also send you their 18650s for testing:

(the one labeled 2800mAh is a protected 18650)

PiercingTheDarkness · 2019-04-01T12:29:58.000Z

Sofirn have seemed to of changed their 14500’s to better cells.

Just finished testing at 3A with the West Mountain CBA IV Pro and I got much less voltage sag than the cell I purchased last year.

0.18A - 894mAh (0.2C)
0.5A - 869mAh
1A - 841mAh
1.5A - 810mAh
2A - 773mAh
2.5A - 671mAh
3A - 573mAh

Superstocker · 2019-04-01T16:49:17.000Z

Thanks HKJ!

Verodin · 2022-03-03T11:57:19.000Z

This test is from almost 4 years ago. Anyone know if the result still applies to currently sold ones?

story · 2022-03-03T17:28:12.000Z

I got four, all are close to 100 resistance but all 900 MAh and above.