How much does it cost to charge an iPhone?

The electricity costs of plugging in that iPhone charger can add up over time. So how much are we talking about to keep your iOS device charged for a full year?

According to Opower the iPhone 5 costs a total of $0.41 per year. The iPhone 4 came in even lower, at an annual electricity cost of 38 cents.

Compared to larger consumer devices such as notebook computers and flat-screen televisions, the iPhone is a power sipper.