Mind sharing were you got it, I've had a couple of the ultrafire 502 lights http://www.ebay.com/itm/1000LM-UltraFire-502B-CREE-XML-T6-LED-Tactical-Flashlight-18650-Battery-Charger-/161110489978?pt=US_Flashlights&hash=item2582eefb7a#ht_4238wt_926 they work great just the switch goes bad.