Those innocuous-looking ‘wall warts’ that plug into the mains to recharge the batteries in most portable electronic devices including mobile phones, laptops and digital music players have a dark side.
If you leave them plugged in after removing the portable device they continue to consume a small amount of power or ‘vampire energy.’ While the amount of energy wasted by a single wall charger is fairly insignificant, it quickly adds up if everyone does it. Read more






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