One of my LED Maglights died on me last night when I was going out in the dark. (As I've said before, I think you are far more likely to need a back up light than a back up gun.) Anyways, I'm just rambling and thinking "out loud"
Anyway, I had 2 others in the truck. When I pulled my other one out, it was SOOO much brighter than the other one had been. Note to self, a LED light is so bright even when it's "getting dim" that you may not notice it's actually getting dim.
So I got home, figured it was out of batteries. When I popped the tail cap inside there was kinda greasy bubbly gunk. Ah, battery failure. Lovely. I'm pretty sure this Maglight had seen some abuse. We used it when processing chickens last August, at night because of the heat (yeah I'm weird) so it possibly got a little wet or greasy then. After that it got buried in some junk in the back of my truck and rained on. This might have/probably contributed to the battery failure. Since it was the end battery that leaked, it would have been the one to get wet
So I took it apart and cleaned it up inside. The tail end battery didn't really look damaged, but it must have leaked because it ate the chrome plating off of the inside of the light in that area.
Again, Note to self and others. Might be a good idea to check up on your gear a little more often than I have been. Had I looked inside I would have noticed the damage before it quit on me in the night.
I think I'll be buying myself another pack or two of D batteries for Christmas. And after drying overnight, the light is functioning again with fresh batteries. I swear, I do dish out the punishment for my Maglights, but they've all recovered. Even my oldest one is still in service after a fishing trip "incident" - Which is why I keep them around.