Iirc Battery 'Acid' is actually an Alkali, the lemon juice is mildly acidic.
Once you put the lemon juice on where the battery has leaked, it will froth a little, neutralizing the acid.
Used this on my 500's that had leaky batterys (500+ and a 4mb ram card with a battery)
That's interesting, thanks.
I might ask someone with access to IPC standards to see if this is covered, I wonder if someone has determined if it's necessary to neutralize before cleaning.