Yes, I'm replacing mine. Battery is only at 28% and running my internet plus security system only gives me 11 minutes at this point. Plus it's only a 550 and I really need a larger battery.If you haven't changed the batteries yet, they're toast. APC / Schneider Electric has no charge management and literally cooks the batteries. I've come into work and smelled electrolyte a few times over the years, found the AGM batteries in the stack split down the side. Always the APC units.