Re: Mdocod's Lithium-Ion>Incandecent guide
While lithium iron phosphate, and especially the lithium nano iron phosphate cells are typically good for very high current applications, The 16340 size cells in this chemistry really haven't proven to be anything special. They can handle heavy loads safely but they are not as low resistance per volume as their larger counterparts.
From what I have seen, most of them take a complete nose dive above 2 amps.
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As for running a P91 on them: You could run 2 and get maybe an average 150 torch lumen for maybe 6 minutes. Or you could run 3 and likely pop the bulb off a fresh charge. There just aren't any common tactical lamps I am aware of that are going to work properly on any configuration of LiFePO4 cells.
The IMR16340s are amazing by comparison, competent to loads exceeding 3 amps and higher voltage than LiFePO4. In fact, when dealing with high power applications, the IMR16340s actually catch up to and exceed the energy density of CR123 primary cells.
When we look at larger cells, like 18650 and up in LiFePO4 chemistry, the picture starts to get more interesting. If we pair them up to the proper bi-pin lamps, or regulate them somehow, they are often capable of loads of 10-20C and higher with very little sag and capacity loss. Not to mention, remarkable cycle life even when operated at aggressive charge and discharge rates.
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Nite said:
Hey MD when are you going to update the guides?
Good question, I guess it's one of those things that I will have to get to when I get to, lol... Lots of new information I would love to include in both the guide and chart sections. I may actually just make a completely new thread, considering how much has changed in the years since it was originally written.
Eric