Here is example of unfixable PoE adapter.
It looks like capacitor leaked.
Here are pictures of Chinese compressed air regulator that suddenly ruptured in violent way.
Spring loaded parts was thrown away across room, i’m not sure if all parts that have ben found.
Not repairable, thrown away ASAP.
Here You can see terrible build quality of Emerson sidewinder LED flashlight IR (Coyote Brown) em8447.
I opened PMNN4104A NiMH 7,2V battery used in Motorola DP3600 thinking about replacement cells inside for Eneloop but opening was almost impossible without damaging inside circuitry and plastic enclosure.
In my opinion it’s unfixable / not worth of fixing . See pictures and video for Yourself.
I tear down HYT BL1719 to check if possible re-cell.
Design to break just by using plastic gear. Not recommend.