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Well, let me start off by saying I could rant for hours about this (420VA under monitor UPS) UPS. It has more problems than an Athlon in a socket 370 MB. It clicks constantly (not like a UPS should, more like a HD) (and when it clicks, it will interfere with any monitor in the vicinity ). If it gets overloaded, it switches to battery (which is unable to cold start a monitor or system (pre ATX) which causes the system/monitor to try to start with insufficient power). And my biggest complaint is one of them had some sort of internal problem and it sent spikes through the outlet my speakers were on frying my sound card. Tripplite refused to replace/repair the sound card. Nice equipment protection policy eh? :disgust:
BTW, after the whole ordeal I sold the replacement unit and bought my first APC BP 650. I have had it over 3 years and it has not given me the slightest problem.