Is it really necessary to unplug your phone charger when you are not using it? In this video I investigate with seven chargers and a Kill A Watt meter.
P3 International P4460 Kill A Watt EZ Electricity Usage Monitor (Amazon affiliate)
US: https://amzlink.to/az0f6rHgjb8dB
CA: https://amzlink.to/az01XuUTtZi11