Originally Posted by
ItsJustMe
FWIW, when my cheap Chinese flashlights have failed in the past, all I had to do was to tighten up the ring inside the endcap with a spanner. I've got a couple of them including the one the OP references, and while they did flake a bit, when they do I just screw the endcap off and give them a good tightening (usually just with the longnose pliers part of my leatherman) and they're good for another 3 or 4 months. I've only ever had to do that about 3 times with any given flashlight before it got seated in enough that it didn't need it after that.
I always wonder about how durable some of these non-cycle specific lights might be. There's nothing like having a light that operates most of the time.
Having said that, I have a 1 watt PB Blaze that isn't the most stellar in this department... especially after I dropped it once.