Been fixing wall warts and laptop batteries.
I'd normally glue them back together with the
stuff used for plastic plumbing.
But the stuff has a short shelf life after opening
and I waste 90% of it. Every time I try to use it,
the can contents is solid. I spend $4 on a can of
glue to fix a 25-cent wall wart.

So, Is there a glue that works well holding wall
warts back together and has a long shelf life?
I have no idea what type the plastic is.

Looking for a recommendation that you have actually
used successfully.

I really don't want to unplug the wall wart and find
myself with a handful of AC when the lid comes off.