New UF 504B, what to know?

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IrishRageTX
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New UF 504B, what to know?

Just bought a UF 504B XM-L light from DD, my first 18650 flashlight!!!! Well versed on the safety aspects of 18650's so what do I need to do with the Ultrafire? Any tips? Upgrades? Advice?

Ultrafire 504B, Ultrafire 504B Aspheric, Super Tactics Thrower, C8, SA-9, MXDL "Mini" C8

harry25175
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just buy a good battery...

jonhobart
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I don't have a 504b body, but I do have Solarforces, I would recommend increasing thermal transfer by using cut up soda cans or aluminum or copper foil/feeler gauge material to take up the space between the drop-in and the host.  Because of machining variations, there's always some air gap between the drop-in and the host.

Oxy Moron
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Yeah, definitely try to improve heat sinking but other than that, I wouldn't worry too much. It's a cheap light, not a $2000 Titanium uberexclusive custom-built light. This summer, I was using a 504b as a makeshift headlight on a dirtbike for a short while. It was definitely better than nothing and got the job done. It's amazing what you can do if you have a roll of duct tape and don't care about abusing your toys. Big Smile