In order to save energy I consider pulling the power cord out of the wall after my Mac has been recharges.
Does a power cord use energy when it is not pugged into a Mac?
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1 Answer
Yes, the charger will use power when plugged in, but much less than when it is actually charging.
Once the mac is charged then unplug the power supply - it serves no purpose leaving it in, but if you forget it is not a huge waste of power.
The term for this is vampire power and if you assume the MacBook charger in this test was equivalent to 3 of the tested chargers combined, it might consume 18 cents of electricity per year in the US.
answered Mar 18, 2019 at 21:31
