Xm-l 14500s

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Langcjl
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Xm-l 14500s
Are there any budget 14500 xm-ls yet?

Piers said " ....but who wants enough light, when you have the option for far too much "

Don
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There probably shouldn't be. With the current an XM-L wants for full output you are way beyond what is safe for a lithium cobalt 14500. That would be an IMR or LiFePO4 cell only device.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

ezeqdb
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Anyway, it could be regulated to 2A, and still be very bright and safe Undecided

"no le temo a la oscuridad, la oscuridad me teme a mí"

Don
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That's still above what is wise for LiCo cells. My homemade one pulls 1.8A from a LiCo 14500. If I could find where I put it, I'd check the current with the IMR cell in it.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

srfreddy
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You should really only be pulling 1.4 amps off a LiCO....

cessnapilot
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is there a thead anywhere on the different battery chemistries?  Are my trustfire flame batteries lico?

Don
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cessnapilot wrote:

is there a thead anywhere on the different battery chemistries?  Are my trustfire flame batteries lico?

 

Unless it clearly says different, all lithium batteries are lithium cobalt chemistry. It gives the most energy storage of the various lithium chemistries so is the most common. Lithium polymer cells are also lithium cobalt I believe. IMR cells which can be persuaded to go boom but you have to work at it, are lithium manganese. Lithium iron (LiFePO4) cells can't be persuaded to go boom though no doubt someone, somewhere has succeeded in doing it.

 

The Wikipedia stuff on rechargeable batteries is not bad at all. Better than many an article there.

http://en.wikipedia.org/wiki/Rechargeable_battery

http://en.wikipedia.org/wiki/Lead-acid_battery

http://en.wikipedia.org/wiki/Nickel-cadmium_battery

http://en.wikipedia.org/wiki/Nickel-iron_battery

http://en.wikipedia.org/wiki/Nickel-metal_hydride_battery

http://en.wikipedia.org/wiki/Nickel-zinc_battery

http://en.wikipedia.org/wiki/Lithium_ion_battery

http://en.wikipedia.org/wiki/Lithium_ion_polymer_battery

 

There are other technologies such as sodium-sulphur batteries but you aren't going to see them in a light since they need to be at above 350C to operate.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

srfreddy
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lifipo4.... hm.... lets see, how about shorting 2 differently charged ones in parallel? And then hammerering then open with a chisel while you're at it? Laughing

Don
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srfreddy wrote:

lifipo4.... hm.... lets see, how about shorting 2 differently charged ones in parallel? And then hammerering then open with a chisel while you're at it? Laughing

 

While "warming" them with a welding torch Wink

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...