Your link does'nt respond, but there are several
chemical schemes I've heard of, but not tried...

Take a look at this:

http://faq.f650.com/FAQs/BatteryFAQ.htm#EDTA

Home Power magazine's site used to have lots of
interesting lead-acid lore, but they've changed their
format (again) & a casual search did'nt turn it up.

Experience says it's likely still there; just better hidden.
Go figure.

Jack
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