DX  » Community » Reviews » UltraFire WF-502B Cree R2-WC 250-Lumen LED Flashlight with Clip (1*18650/2*CR123A)
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  • Overall Rating: 5
  • Price: 4
  • Quality: 4
  • Ease Of Use: 5
  • Usefulness: 5
One of the best lamps – UltraFire WF-502B Cree R2-WC 250-Lumen LED Flashlight with Clip (1*18650/2*CR123A) Reviews

posted by Supervisor4 on 03/18/2011 Certified Owner

Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month

good price, decent brightness.
Same issue with all the 502Bs: The pill/reflector don't fill the lamp head, so there's a lot of air between them and the body which is bad for heat conduction. Put on a bit of thermal grease if you think it's a problem. The CR123's are narrower in body than an 18650, and if you use protected ones this allows them to "buckle" a little inside the body so that the contact between them isn't as good. An easy fix is to wrap a dollar bill or some paper around them before putting them into the body- $1 USD is exactly the right height/thickness to steady them :)


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