for like $75 you can gte this pretty damn nice Surge Protector wiht built in battery, it will keep your machine running for 5-9 mins. jus tperfect to float a brownout or lightning strike...and if extneded it can automatically safely close your system out.

you can see the black cord to mine just to the right of the monitor, i need to repair it though, someone jacked the GFI in our house and it blew a fuse great electricians.