AAA battery stuck inside flashlight. How to remove?

A packing remover might do it. A cork screw would be another thing to try. A long screw that you can reach the batt with. Screw it into the end of the batt and pull it out.

If the battery is stuck, it is probably corroded, and the flashlight itself is most likely damaged but the corrosion. I have never seen a AAA powered flashlight that was worth the effort to bother fixing. A new flashlight will probably cost less then a new battery.

Sounds like the electrolyte in the battery has leaked and corroded the flashlight. Throw it away and buy a new one.

keep banging it till it gives up,or trash it and start all over. Flashlights are cheap.

I recommend throwing the flashlight away and getting a new one. The battery is stuck on something, meaning something is damaged in it. Repair is not likely to be practical and flashlights are cheap.