Hey folks,
Does anyone have any experience with these ultrafire BRC 32600 li-ion batteries? A quick google search only turned up a couple of unanswered questions on cpf. Even though they say li-ion, I'm wondering if they're not LifeP04 due to the 3.0v rating, 2.0v minimum discharge, and 4000mah capacity. I have an upcoming project that these would go splendidly in, but would definately like to know more.
D cell Lithiums??
I seriously don't like the idea of putting 18650s into a wide body Mag, so having 4000mA of capacity (even if its not as high an energy density as good 18650s) is still twice as good. Making use of the space in a usable way.
Could have 4 of these driving a 3A buck driver with 3 emitters in series... 30 watts of fun! (only problem is the efficiency of the driver.. budget drivers with 80% efficiency means were expecting to lose 7.5 watts = enough to unsolder the components!
Well, I was hoping they are LifeP04...because I was planning on running 4-8 in series. I wouldn't want to do that with li-ion or even liMn.
I have tried running one xm-l off of one lifep04 and current draw was rather low. Could have been the quality of the cells I was using though (14500's from Walmart).
Thanks Bob. I chickened out on ordering the ultrafires and went with a known product, i.e. the 26650 3300mah from batteryspace. I was also eyeballing those 38120's for another project, but those will have to wait for the moment.
Yeah… those won’t do anything like what a real LiFe cell will do. I’ve got some A123 18650s that I’ve been playing with but I haven’t found a perfect application yet. They’re fun to beat on though. I was doing a couple 10A discharges yesterday and they didn’t get even warm.
It won't help you with these, but I have bought (6) of the 32600's from Kaidomain and they all have been excellent. Ratings and discharge were right on... they were also LiPo not the LiFe version so they had 3.7 nominal and 4.2 max voltages - also more expensive about $15 each... just FYI
They are quite impressive. The pair I have put out 4500mAh+ at 5 Amps. That’s a lot of power (that could go very wrong if mistreated).
[quote=oldbobk]
okwchin,
What's the problem with Mag bodies? [quote=okwchin]
Just the fact that its space that isnt being fully utilised... Im just picky like that.. Only thing I have against mags are the price... its around $80 here locally for a 4D mag Incan, $100+ (ive seen up to $150) for an LED version. Thats AUD, convert that to USD!
These seem to be really low density. If a 18650 had the same density, it would be:
4000 * (18^2*650) / (32^2*600)
Ans = 1371.09375 mah
[quote=oldbobk]
okwchin,
What's the problem with Mag bodies? A piece of 1" PVC, 4-5" long, slit lengthwise so that you can insert a same-length 3/4" piece. Good fit for 18650s. For the 26650s, omit the 3/4 ", don't bother with the slit. Old Maglites are really neat, too. I think we managed to slip 4 AAs into one, side-by-side. I just don't have enough battery chargers to make this less than tedious. Additionally, You can run 3 C NiMHs in a 2 D body. The Mag is a very versatile host for really high-powered lights. Sure, you can fit a triple XM-L into a L2. Runtime is way short, and then there's the heat factor. I went through the process of making four copper sinks for Mags, plus some aluminum ones. So, I can make quite a few flamethrower lights. I live in the country, little light polution. That's where the big lights are really fun to play with.
Bob K
exactly what I do. one inch and 3/4 inch pvc!
[quote=okwchin]
[quote=oldbobk]
okwchin,
What's the problem with Mag bodies? [quote=okwchin]
Just the fact that its space that isnt being fully utilised... Im just picky like that.. Only thing I have against mags are the price... its around $80 here locally for a 4D mag Incan, $100+ (ive seen up to $150) for an LED version. Thats AUD, convert that to USD!
[/quote]
I agree they are too exe here.
Ghetto battery rigging is the least of a maglite's problems.
A trustfire 1200 body is only $13 shipped and fits a collection of drop-ins including a XML for $20, which would work out of the box with mods.
LiFePO4 18650 has around 1350 mAh so nothing strange.
My initial veiw of modded mag lights was that they were expensive to do ..that somehow you really had to want a moded mag light way more than I ever did ..certainly a cruise thru cpf will pop up some very cool moded mag lights ..Buy honestly most are excessive almost if only for excessives sake alone .I can't afford the batteries or can't see the benefit vs.Cost and time ..Makes no sense to me .
Why would these have anything to do with KD? Ultrafire made a whole new charger with LiFePO4 capabilities just for these cells (the WF-188).
I love Mags and can't wait to waste a wad juicing one up. What I really want is Kel-Lite.
offtopicFoy
I don't think the Kel-Lites ever made it out of the US. Wonder what sort of current their switches will take?
IT has often been said that Mag switches are good for 10-12A. I suspect they have reduced their manufacturing costs, in recent D Mags, the switches seem to give trouble above 4A.
Simple (but far from cheap if you buy them built) answer, build in FET switches so the Mag switch only sees a few milliamps. Wish I knew something about electronics