Eaton is the only UPS manufacturer that seems to be trying. All others (I’ve worked with most all of them) do simple float charging of their batteries and scheduled “tests” which just involve blindly switching load over to battery for a few seconds.
Eaton’s ABM* at least doesn’t do that, so your UPS doesn’t drop the load during tests when the batteries are unhealthy. They also make plausible claims that it substantially improves battery lifetimes (which eventually becomes a larger expense than UPS purchase price). But pay attention as not all Eaton UPS units have ABM.
From: Sysadmin Mega Thread - #4662 by rcxb
After several years of running several Eaton 9pk6k units and a few Eaton 5SC’s, I’ve had no problems. Of course there’s no substitute for have dual power inputs on your important system, either dual PSUs or an ATS switching PDU. In a company with hundreds of APC UPSes large and small, one of them would drop the load on something or other every month.