In the case of a scooter battery I bought last year,
there was a box of
acid to install, but there was none left over. why would you not want to
add all that was provided? There was removable caps, but it was only for
opening it up once to add acid, and then forever sealed. One thing I can
say about those batteries, they sure don't last long for being so
expensive! If you let them go dead just once, they never recover.
Buy a replacement from a "real" battery supplier.
On this list though I can't imagine anyone that could "leave alone" such a
potential electronic hot rod project. Fact is, now that I think about it,
"I" am pretty tempted to try some stuff.