EV>Abiko is a new term/word for what I've always called Faston Terminals.
EV>I'll look the word up to see if it is in the Wordweb dictionary.

EV>I have seen two different sizes of Faston terminals in things that I
EV>have got to salvage the parts out of them.

0.187 and 0.25 are the ones most popular. There is am standard because
twi Identicla batteries i nphycsical size an Ah Rating camn be
different.
As mentioned before the 0.25 connectors work pwefectly on the 0.187 tabs
but the other way there is a problem.

EV>The Terminal Size Specification most likely isn't in the Specs for the UPS
EV>Battery, so I wouldn't know until I get the replacement battery if the
EV>Battery Specification has changed (Improved) over these past five years.

Depends on where you get the batteries. I a lot of cases I see the tab
size in the specifications for the battery.
MCM Electronics notes the connector size. They are also a good benchmark
on what you can expect to pay.
Be careful of the link wrap:

http://electronics.mcmelectronics.com/search?p=KK&srid=S3-USWSD01&lbc=mc
electronics&ts=custom&pw=Batteries&uid=643358289&isort=score&view=list&w
Sealed%20Lead%20Acid%20Battery&rk=3=m
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 þ SLMR 2.1a þ Typo Tom Strkes Again