Bests & Worsts Reviews from Amazon

I used this for 3 years. It was a solid UPS that seemed to do all it was supposed to. Couldn't have been happier. Then I received error F03. This happens either when there is a problem with the charging circuit or the battery needs replaced. Ok. I cannot accept that. What I cannot accept is that when it has this failure, it disconnects the load. Everything is turned off. Completely stupid design and built in engineering flaw. Back to APC I go! When APC's fail, they keep the load connected to the utility power and just don't provide backup. Then you can buy batteries and off you go! Refuse to invest anymore into this faulty design.