Many times we leave our gadgets Mobile phones, PDAs, MP3 players, Cameras, Laptops etc with charger plugged in overnight. Lets check if this is a major waste of energy..
What happens if you leave the mobile phone plugged in all night?
According to measurements from Lawrence Berkeley National Laboratory, the average cell phone draws 3.68 watts of power from the outlet while it’s charging and 2.24 watts when charged. Let’s take the worst-case scenario and assume that you’re over-juicing a charged battery for the entire night. Leave the average phone plugged in for eight unnecessary hours, and it’ll use about 0.018 kilowatt-hours of electricity. Do that every night for a week, and the figure rises to 0.13 kWh; every night for a year, and you’re looking at a grand total of 6.5 kWh of electricity.
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