Test/Review of Brillipower 18650 3400mAh (Black)

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HKJ's picture
Last seen: 1 day 19 hours ago
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Location: Copenhagen, Denmark
Test/Review of Brillipower 18650 3400mAh (Black)
Brillipower 18650 3400mAh (Black)


Official specifications:
  • Nominal voltage: 3.7 Volt, fully charged: max. 4.20V
  • Capacity: 3400 mAh
  • Temperature range: -20°C to 60°C
  • Top: Button Top
  • Size:: 68 mm (Length) x 18 mm (Diameter)


A protected 3400mAh battery, capacity is as expected.
The cell used can be discharged down to 2.5 volt, in my test I only discharges to 2.8 volt, i.e. I do not measure the full capacity. But then, not all lights will be able to use the full capacity.

DSC_5733 DSC_5734

DSC_5736 DSC_5737



The curves are as expected for this battery. The difference between the two 5A traces is probably due to component tolerances in the protection circuit. For one of the batteries the protection circuit trips just before the trace is finished.








A good 3400mAh battery, the protection does a good job in protecting the cell from misuse.

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
Compare to 18650 and other batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

lagman's picture
Last seen: 2 weeks 5 days ago
Joined: 05/13/2014 - 12:24
Posts: 583
Location: France

Thanks for the test!
Looks like an other rewrapped NCR18650B to me…

My English isn’t perfect but I’m trying to improve it. If you see something that doesn’t sound right or is just plain wrong, please feel free to point it out! Smile

WarHawk-AVG's picture
Last seen: 1 year 7 months ago
Joined: 01/04/2014 - 06:47
Posts: 5071
Location: H-Town

Nice…alot of capacity as well

Great review as always HKJ!

Last seen: 1 year 1 month ago
Joined: 07/25/2012 - 17:43
Posts: 4278
Location: San Diego, CA

Nothing wrong with rewraps if it makes them more accessible and increases competition. 


I like that type of button a lot better than the regular flat top button that comes on an unprotected NCR18650B.  That other button is weak.

The low mode should be lower.

FlashLion's picture
Last seen: 4 years 6 months ago
Joined: 07/21/2013 - 18:51
Posts: 327
Location: Europe

I have two of these batteries from more than a year now.
Decided to see finally,is it a Panasonic inside,or not.
I cut part of the wrapping. Light green color underneath.
Yet,not 100% sure,because there’s no marking where I cut.