I'm looking to get a backup battery, but something to regulate the power all the time. I think the voltage in my building sucks. I want it to cover my 2 displays (23"&15") and exturnal harddrive and soundsticks. I would like it to give me about 10min of power after the power goes out for me to shut down. And for it to work in 10.3. Any ideas, I don't know much about these.