Just redone my computer area but my old battery backup has a computer already on it so it could not be moved. So What voltage or what ever i need to for the late 2009 mac mini it has 2 23in AOC Monitors and a 2tb WD MYBooks Studio II that i want to have on the battery backup also. Best Buy has one for sale for 42.99 its an apc which i already know the company well as thats what the other ups i have is but the one i am looking at is 350VA is this enough for at least 20 Min at least of battery backup with what i got.