I have a (refurbished) APC Back-UPS LS 500 I've been using for a year and a half or so, and ... APC software, which pointed out to me that the "Replace Battery" light was flashing deep under ...

I have an APC Back-UPS CS 350 unit that has all lights flashing about once every two seconds, with the regular "power on" LED lit green. All I've been able to find regarding other APC units that ...