Test/Review of Brillipower 26650 4000mAh (Black)

[size=+3]Brillipower 26650 4000mAh (Black)[/size]



Official specifications:

• Model: Li-ion 26650
• Brand Name: Brillipower 26650 4000mah
• Nominal capacity: 4000mAh
• Nominal voltage: 3.7V 26650
• Battery material: Li-ion battery
• Positive pole: Flat top
• Impedance: <80mOhm
• Cycle life: >500 Cycles
• Operation temperature: Charge(0 ~ 45°C)Discharge(-20 ~ 60°C)
• Storage Temperature: -5 ~ 35°C
• Dimension: Diameter 26mm, height 65mm
• Weight: About 95g

The large size LiIon battery with more capacity than rated.










The two batteries tracks fairly well, but the over current protection is a bit low, it trips the 5A trace.















[size=+3]Conclusion[/size]

The cells used looks good, but the protection current limit is on the low side, and the battery does not have that great performance at a couple of ampere, compared to other 26650 batteries.



[size=+3]Notes and links[/size]

The battery was supplied by msitc-shop 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

Are 26650s often under-rated? Especially since you don't run them all the way down, getting over the rated capacity at anything up to 3A draw seems like a good deal, as long as you don't need a ton of amps.

thedoc007 said:

Are 26650s often under-rated? Especially since you don't run them all the way down, getting over the rated capacity at anything up to 3A draw seems like a good deal, as long as you don't need a ton of amps.

Click to expand...

Depends on brand, but it happens fairly often in the 4000-4500mAh range, you can check here: http://lygte-info.dk/review/batteries2012/Common26650comparator.php

Thanks a lot for your effort and time for doing this informative & excellent review. HKJ! :thumbsup: