> A power cube has a transformer as the initial component inside. The input windings are connected to the ac and convert the wall power to a lower level for the charger to use to charge your ipad. This winding creates a load on the wall power that is lost as heat when the charger is not in use. If you have anything creating heat, however minuscule it takes energy. Granted it is very little, but it is wasted energy.
In *my* home, in the winter, that heat is not being wasted....
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Jim Saklad mailto:jimdoc@me.com
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