Features:
When the mobile phone charger is plugged into the power supply and not charged, it will not generate current, and there is almost no power loss. The reason is that U (voltage) = I (current) R (resistance), when the charger is not connected When using a mobile phone or other USB powered devices, the load is infinitely small, the resistance is infinite, and the current I=U/R=5/∞≈0A. In this case, there is almost no current, and there is no need to worry about electric shock.
When the mobile phone charger is plugged into the power supply and not charged, it will not generate current, and there is almost no power loss. The reason is that U (voltage) = I (current) R (resistance), when the charger is not connected When using a mobile phone or other USB powered devices, the load is infinitely small, the resistance is infinite, and the current I=U/R=5/∞≈0A. In this case, there is almost no current, and there is no need to worry about electric shock.