I have myself several Ultrafire lights sitting here, all suffer the same issue:
bad contact in the tailcap, causing the lights to flicker or shine with lower brightness..
First thing i tried, was to screw down the retaining ring in the tailcap; worked for a while, but then the issue was back.
Then i made new solder blobs to the switch pcb; worked for a while...
Finally i bended a piece of 0,5mm wire and soldered it to the pcb..
The lights work fine now, without any flickering.
bad contact in the tailcap, causing the lights to flicker or shine with lower brightness..
First thing i tried, was to screw down the retaining ring in the tailcap; worked for a while, but then the issue was back.
Then i made new solder blobs to the switch pcb; worked for a while...
Finally i bended a piece of 0,5mm wire and soldered it to the pcb..
The lights work fine now, without any flickering.
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