We had a power outage last night for 3hrs or so and I got my first chance at using my battery back up. Mine is pretty much the same thing quinten801 talks about and is made to back up a business sized server. Power wasnt out too long but my snakes had heat the whole time!... The battery back ups are kinda pricey(I think mine was like 500 & made my American Power Conversion) but if you got an incubator full of eggs theyre well worth it!