Perfect timing on this thread. I have a big APC UPS unit that was used for a high end server I was planning on looking at today and deciding what to do with it. It's been sitting in my breezeway for a year now, been putting it off to the side, deciding what to do with it. After reading this thread, it will most likely be scrap. It's been in outside temps for fall, winter, spring, summer, so the batteries are probably junk at this point.