chemistry of new green wrapped 3.0V UltraFire BRC batteries

[Techjunkie]

I just picked up two each of the C and D sized 3.0V UltraFire "BRC" batteries with the green shrink wrap. The specs for the voltage range and the capacity seem to be the same as Download's C and D sized LiFePO4 batteries. So far, they are behaving the same with respect to charging and discharging, and from what I can tell, voltage sag (or lack thereof) under 2.0-2.8A load. Until I hear otherwise, I am assuming that the chemistry is LiFePO4. That doesn't seem like a stretch of the imagination to me, given what I've said above and the fact that the green 3.0V UltraFire RCR2 which have been around for years are also reportedly LiFeOP4. (I have two of those as well and as best as I can tell, they behave like that chemistry as well.)

If anyone has an inside track at UltraFire (or Shenzen, or whatever the parent company is), I'd really like some verification or dispute of this. Thanks.

P.S. I have a 22600 3.7V BRC on the way in the hopes that it will fit nicely in all those 3AAA/18650 compatible torches. I'll let you know if it does.

 

[phlowcus]

Hey, any news about those 22600 3.7V batteries? I'd like to get those, unfortunately the price has risen extremely at the place I'd get them from.

Do they work as 3*AAA replacement, did you measure capacity, please? :)

 

[Techjunkie]

Hey, any news about those 22600 3.7V batteries? I'd like to get those, unfortunately the price has risen extremely at the place I'd get them from.

Do they work as 3*AAA replacement, did you measure capacity, please? :)

I have one and one more on the way. It fits fine in my 3-AAA/1-18650 torches, namely UltraFire C308 and SmallSun ZY-C37. I have not done a runtime or capacity test, but based on the amount of time it took to charge, I'd say it's a safe bet that these have more capacity than 18650 cells of the same brand.

There's a little discussion about them going on here.