Test/Review of UltraFire BRC32600 4000mAh 3.0V (Green-white)

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,715
Location
Copenhagen, Denmark
[size=+3]UltraFire BRC32600 4000mAh 3.0V (Green-white)[/size]

DSC_1047.jpg


Official specifications:
  • Voltage: 3.0V
  • Capacity: 4000mAh
  • No PCB protection board included

UltraFire%20BRC32600%204000mAh%203.0V%20(Green-white)-info.png


This is LiFePO4 batteries, this means they are 3.2 volt nominal voltage. This voltage is to low for a typical 1xLiIon flashlight.

DSC_1045.jpg
DSC_1046.jpg


DSC_1048.jpg
DSC_1049.jpg


DSC_1050.jpg

DSC_1051.jpg

DSC_1052.jpg



UltraFire%20BRC32600%204000mAh%203.0V%20(Green-white)-Capacity.png


The battery has a very flat discharge curve, where voltage depends on current draw, not on how much charge is left in the battery.

UltraFire%20BRC32600%204000mAh%203.0V%20(Green-white)-CapacityTimeHours.png


UltraFire%20BRC32600%204000mAh%203.0V%20(Green-white)-CapacityTime.png


UltraFire%20BRC32600%204000mAh%203.0V%20(Green-white)-Energy.png


UltraFire%20BRC32600%204000mAh%203.0V%20(Green-white)-PowerLoadTime.png


UltraFire%20BRC32600%204000mAh%203.0V%20(Green-white)-TripCurrent.png


This type of battery does not have a protection circuit, because the chemistry is safer.

UltraFire%20BRC32600%204000mAh%203.0V%20(Green-white)-Charge.png




[size=+3]Conclusion[/size]

The performance is good for a cheap battery, but the capacity is overstated



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

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
 

candle lamp

Flashlight Enthusiast
Joined
Jun 16, 2010
Messages
1,572
Location
South Korea
Thanks you very much for your excellent test review as always. HKJ!

As you mentioned, this battery is safe although it has no protection circuit. Does it mean LiFePO4 cell is safe in overdischarge without the protection circuit?
 

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,715
Location
Copenhagen, Denmark
Thanks you very much for your excellent test review as always. HKJ!

As you mentioned, this battery is safe although it has no protection circuit. Does it mean LiFePO4 cell is safe in overdischarge without the protection circuit?

It will not go :poof:, but it will still damage the battery to over discharge it.
 

ma_sha1

Flashlight Enthusiast
Joined
Jan 10, 2009
Messages
3,042
Location
CT, USA
Thanks for the review, I've been wondering about theses. How hot does it get when doing 20A discharge? Will it maintain capacity at 20A use?
 

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,715
Location
Copenhagen, Denmark
Thanks for the review, I've been wondering about theses. How hot does it get when doing 20A discharge? Will it maintain capacity at 20A use?

I cannot answer either of the questions. I do not have a temperature sensor on the battery when testing it and I do not have enough equipment to test a battery at many cycles (I need my equipment for other tests).
 
Top