There are lots of questions about uninterruptible power supplies that are improperly tagged as [tag:apc] (Alternate PHP Cache) Here is a sampling but there are more. - http://serverfault.com/questions/263569/mix-and-match-avocent-ipkvm-with-apc-server-module - http://serverfault.com/questions/261118/is-this-an-nema-l6-30r-plug - http://serverfault.com/questions/231934/apc-smart-ups-network-shutdown-issue - http://serverfault.com/questions/210553/graceful-shutdown-of-ubuntu-machine-with-apc-ups-network-to-usb-cable - http://serverfault.com/questions/193503/how-to-clear-the-replacebatt-state-from-apc-ups-after-hot-swapping-the-battery I'm suggesting a new tag [tag:apc-php] then do a merge and create another new tag [tag:apc-ups]