I think I would try making a loop at one end of some 12/14 gauge wire and solder it to the top of the battery, and then try to pull the battery out that way.
Biggest issue here is going to be that he’s only got access to the bottom of the battery because the light is a unibody design. I agree with the epoxy ideas. Maybe freezer and epoxy. I’d see if you can drain the cell by connecting the negative end to the body of the light and leaving it on, just in case anything unfortunate happens.
If this ever happens with alkalines, though, feel free. It’s a bit messy but there’s no fire danger.
Yeah but probably not bonding to metal.
Oh for bonus points, scratching the metal a bit with something (sandpaper, but idk if you can get to it easily?) should help with adhesion.
I have successfully removed stuck batteries by taping the light to the end of a broomstick perpendicularly to the the broomstick and slamming the stick against a table or something. The broomstick and light come to a stop but the battery keeps going.
al gets hot lot faster than steel, so the AL tube will expand sooner than steel battery will. but i still would not do it, temp needed to expand the tube enough will heat the battery above safe temp.
Maybe best of both worlds. Leaving it a night in the freezer. And then holding it in your hand.
In bare hands is perhaps a bit too much, in that case I would suggest a pre-heated oven mitten.
Assuming that the alu on the outside will get warm faster than (the cold core of) the battery.
Tapping from time to time. On a piece of wood, if the battery does not protrude from the body.
is it a protected cell with a pcb on the negative side? if so solder something to the negative end, and pull on it, even if it s not protected, solder anyway, it’ll destroy the cell, most likely but it’ll be out