Well,
For you the details are,
I used two different AC's water in two different batteries (both of AGS) One at my home one at my office. And the AC's were one Mitsubishi and other was Sabro...
Both my batteries were purchased same day and both ended up in just 9 months and 12 days and 9 months and 23 days each..
We all together bought three batteries two for me and one for my cousin... My cousin's one still working he used tap or Filtered water to top up the batteries.
I have been using batteries for UPS and car for last 10 years each of my battery goes almost 3 to 3.25 years on average this particular case was the first and only one that my batteries lasted even lest than a year...
I hope that would clear alot if queries in your mind about my usage of batteries.. And why i highly don't recommend using AC water for topping up the batteries ever...