I have seen regular batteries leak before as a kid (some 25+ years ago), dark (black/brown) substance oozes out of the battery coating everything.
I have No Name/Unknown brand heavy duty D cells recently leak. I am surprised it is leaking clear white sticky fluid. How come it leaks clear white fluid and not the dark brown substance I saw as a kid? I suppose it depends on the battery chemistry?
I have some no name brand alkaline AAA cells leak what looks like a powdery white substance.
When your batteries leak, what do you see? Please share your experiences.