27 September 2012 2:49 pm BSTUpdated: 28 September 2012 5:34 pm BST
Photo by: Stephen Shankland/CNET
/ Caption by: Stephen Shankland
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How well do you know your surge protector?
Whether you're looking to add more outlets, or want to add a layer of protection between your gear and the outside world, here's what you need to know.