If you take a quick look around your home, or perhaps even just one room, you might find that a lot of your outlets are in use. From phone chargers to televisions, blenders, hairdryers, and more, we use lots of devices to keep our lives going these days. What you may not have known is that many of these devices can increase your power bill when plugged in, whether or not they're actually in use – this is something called phantom power.