Thought that IMR batteries were "good"? Can they burn out tailcap?

[ohaya]

Hi,

I’m trying to figure out how to disassemble the tailcap?

I found this:

Modding the TechLite Lumen Master (aka the Costco Special Cree Flashlight)

Alright, I've seen questions on a couple of forums off and on about these flashlights, so I thought I'd post up a little mod I did to make a crappy flashlight in to actually a pretty good one. I also think this is a mod that anyone can do. The light can be seen here - https://budgetlightforum.com/t/-/626 Here's a eBay link to one of them - http://cgi.ebay.com/TECHLITE-LUMEN-MASTER-TACTICAL-LED-FLASHLIGHT-w-STROBE-/260706401215?pt=US_Flashlights&hash=item3cb34ffbbf#ht_1635wt_1139 The bu…

and I can see the whitish plastic ring with 4 notches (at 90 degree intervals), but I can’t get it to budge with a needle nose (per that thread). Tried to turn it with a flat screwdriver which didn’t work either :(…

Any ideas? Do I need like a spanner wrench or something (don’t have one of those)?

Thanks,
Jim

P.S. So was getting/using the IMR batteries a bad idea, in general? Or, just because of this light?