One thing that puzzles me is why can't AW manufacture both ICR & IMR cells for using the same can die? From what I understand, he ceased manufacturing the li-ion C batteries because the die disappeared with the failed factory, yet now he is manufacturing almost the same size cells but only using IMR chemistry. Am I missing something?
AW C Li-Ion cells, what will you replace them with?
- Thread starter cernobila
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cernobila
Flashlight Enthusiast
This same question has been asked by a number of my friends, if he can make the IMR C cells why cant he continue to make the Li-Ion C cells......is there such a major difference?.......there must be a technical reason for it but only AW can answer this question.....I am sure some of us would be interested in the answer.
I'm in a bit of a quandary over what to do with an FM 2C body, now that I can't get these cells. In particular, won't the IMR cells kill all high output 6v bulbs that will fit in a D26 head, yet still underpower all the long life ones?
The IMR-9 would be attractive, but claims to require a twisty, and as far as I can tell none is available for the FM C body.
:thinking:
The IMR-9 would be attractive, but claims to require a twisty, and as far as I can tell none is available for the FM C body.
:thinking:
cernobila
Flashlight Enthusiast
....or the BigLeef, or the Mag C etc.....as far as I know.
bretti_kivi
Enlightened
IMR = "safer" chemistry. Medium term, I'd suspect all LiIons would be replaced with these, at least standard, loose cells.
If there's no demand, there's no product. If the factory doesn't want to make the "old style", then....
Bret
If there's no demand, there's no product. If the factory doesn't want to make the "old style", then....
Bret
I saw somewhere around here that the IMR-9 is drawing about 2.5 amps. Perhaps Fivemega could say whether that's reasonable for the switch in the C body.
They are different. 25mm vs 26mm ( the 26mm casing size is readily available because they are made for 26650/26770 cell sizes ). The 25mm casing + 25mm safety vent module is custom made for protected C cell because it need a smaller diameter cell to accommodate the connecting strip for the pcb. 1mm makes a big difference in cell diameter. I can make the 26mm protected C cell but it won't fit a Mag C because it 'll measure at least 26.5mm in diameter. Even with a 26mm cell, it will be a tight fit.
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ANDREAS FERRARI
Flashlight Enthusiast
AW,what am I suppose to do with all these extra extender rings I bought from you. LOL 
lctorana
Flashlight Enthusiast
AW said:
That's what I have been wondering myself. I took my calipers to my 4C but they don't quite reach the battery tube. Whether a 26 mm cell will fit is not assured - do you have a C Mag and can you check if a prototype goes in?
If it does, we are in for one of the most exciting hotwire pases ever on CPF. (And if it doesn't, we'll get good at honing!)
cernobila
Flashlight Enthusiast
Just measured my 2xC Mag at 26.5mm, the BigLeef at 26.2mm and the Fivemega C at 26.1mm.
FredM
Enlightened
Are the unprotected models the same cells as the protected ones? Where are they available?
Kestrel
Flashaholic
AW, thanks for the post, this clears things up some.
Thank you for the measurements, this is helpful.
My question as well. Good thread, this.
I have some "5000 mAh" 25500s on order from DX, real capacity is apparently about 3000 mAh. I'd like more, but that's still almost twice what you get with NiMH AAs, and I don't need to mess with holders...
In light of AW's remarks, apparently these (being 25500, not 26500) were intended for making protected cells.
I don't know; I'm actually planning to do the evil thing and run them naked, with no protection in the light either. Frequent voltage measurements FTW! I think it would be hard to fit a protection circuit in this one, and I'm more concerned with melting down the flashlight than killing the batteries; once I've toasted it (Who'd have thought 35W in a $5 yellow-light would cause grief?
), and moved all the components to a more robust host, I'll probably see about a low-voltage cutoff.Protection on each cell would be the best thing, in case of imbalance, but I think protection for the whole stack should be good enough if your cells match. (And it depends; if you're charging the stack in series, I'd definitely be worried about not having each cell protected for over-voltage; if you're using loose cells (my approach) or otherwise charging individually or parallel, I'd try to make sure I can trust my charger not to burn things, and use just low-voltage protection in the light.)
Perhaps someone who's done this before can correct any of this; while I like to think I've got a handle on this stuff from reading, this will be my first Li-ion build.
Good luck with that. As far as I am concerned DX & Quality becomes an oxymoron. Personally, I would go with Powerstream.
Hi LuxLuthor,
I can't find any mention of a Lithium C cell on the Powerstream website. Am I missing something?
Thank you
I can't find any mention of a Lithium C cell on the Powerstream website. Am I missing something?
Thank you
etc
Flashlight Enthusiast
Can you put 3 Alkaline C cells in it? If so, it would work nicely with Malkoff M30 module.
Kestrel
Flashaholic
Post # 28, this thread:
Post # 29, this thread:Actually I now would like to try and use my M30 (1V to 5.5V, 1A) with 3xC Alkaline cells (4.5V) in the FM 3xC body. Never used Alkaline's so have no idea of the run time in this combination....any ideas? I am sure I will come up with some kind of spacer if I look around my garage.
cernobila
Flashlight Enthusiast
Yes you can, may need a spacer if you use three of them but it should work very nicely.....I plan to do just this.
