For future reference; Low heat using butane torch immediately follow with cold water quench will break loose fused tailcaps. Works for stubborn nuts & bolts as wellMine was the “tesco £10 light” as recommended by a great many people on a cycling forum. It was about 100 lm and ran on two c cells. Before that I had upgraded my old beat up 6 D cell maglite with an 800 lm triple led drop in I paid a small fortune for.
I actually dumped the whole maglite including leds in the trash before joining this forum as the tail cap had become fused to the body and even with a vice and large plumbers grips could shift it.
I regret doing that now.