Posted by a reviewer on Amazon

Updated april2020had the unit in storage for the last 2 years brought it back out plugged indead as a doornailcontacted support knowing its out of warranty triplite support responded and fast advised that unit will be dead but work on bypass when batteries dead got new batteries from amazon installed up and running perfect trip lite did not disappoint responded eve though units sn is obviously passed warranty by a few years a note on batteries we have multiple smaller ups triplite units mobile command post type environments and they travel over hard roads at times the only thing thats annoying is the batteries in those units not the units go bad faster the electronics were of great concern but it turns out the batteries need changing every 23 years but the actual units are still bouncing around in mseries vehicles all over the place just fine a bit annoyed with the battery situation and it has nothing to do with triplite just a note for those looking for mobile environments