I had a pretty decent flashlight stashed by the back door. (Fenix E21) This is a convenient spot since it's by the kitchen. Literally I just used it...and now it's not working. WTF batman......
Checked the batteries (Duracell Ultra)...ruptured cell....DAMMIT!!
and it's stuck. This model had a removable head so I was able to pound out the stuck cell. Fresh batteries did not help. It's a paperweight.
Oh leaking batteries are no joke. ACID! take reasonable precautions. Wash/flush your hands throughly. It did eat into the metal cylinder of the light. That is what I think caused it's untimely demise.
There isn't anything I could have done to prevent the situation. Warranty covers manufacturer's defects and not ruptured cells. At least it wasn't a $300 Streamlight or something! And I have several lights that can easily take it's place.
After some google-fu it appears the light is discontinued...so even if I wanted to fix it somehow it' would be not worth the effort to find the parts.
Hope you learned something!