New UF 504B, what to know?

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Last seen: 7 years 8 months ago
Joined: 01/03/2012 - 12:37
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Location: Texas
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's picture
Last seen: 6 years 6 months ago
Joined: 08/26/2011 - 11:43
Posts: 439
Location: Padang - West Sumatra

just buy a good battery...

Last seen: 11 months 1 week ago
Joined: 08/09/2011 - 21:59
Posts: 201

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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Last seen: 1 year 8 months ago
Joined: 03/24/2010 - 13:55
Posts: 813
Location: USA

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