APC Smart-UPS 1400: Bottom red light (battery bad) remains on even after replacing battery in this UPS, but it goes green immediately on other UPSes.... What do? : r/sysadmin
Video: Why might my APC Back-UPS Product be beeping? - APC USA
How to Permanently Disable the Beeping Alarm on an APC Back-UPS ES 500 Battery Backup · Share Your Repair