Like any device when connected to Stand-by, it will always have a minimum consumption, which will increase when there is a demand for consumption when fully operational, as with TVs, sound equipment, and any modern device that uses this Standby technology, in the case of Laptops, tablets and cell phones is the same, connecting the charger to any of them increases the consumption of the charger, obviously they do not work hot as the old transformer since this is another low consumption technology largely canceling energy waste by temperature ...