"Please also note that the USB ports only draw power when something is physically connected to the port."
I wonder if this means that if you leave a charging cable plugged in it leeches power, or if it's actually smart enough to detect the device at the end of the cord.
Only if there is an indicator light on that chord somewhere will it use power. If there is just a chord and nothing else, then no it's not using power. There actually has to be something drawing power to actually use power.
@rlobrecht This is almost certainly a lie. Unless it has a physical switch that closes when you plug in a USB plug, then it has to have some circuitry on to create regulated +5V even if it isn't used. Or even if it uses electrical detection of a USB device, that's still taking power to do it.
Some sockets are setup so that the act of inserting a plug makes a connection that switches on the socket. (usually by pushing a spring loaded contact to close the circuit)
@rlobrecht Unverified: you're wrong. You cannot do anything without electricity to do it. So unless it has a mechanical switch to turn it on when something is plugged in, it takes electricity even when "off". It may take very, very little. But very little is not the same as none.
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"Please also note that the USB ports only draw power when something is physically connected to the port."
I wonder if this means that if you leave a charging cable plugged in it leeches power, or if it's actually smart enough to detect the device at the end of the cord.
@rlobrecht
Only if there is an indicator light on that chord somewhere will it use power. If there is just a chord and nothing else, then no it's not using power. There actually has to be something drawing power to actually use power.
@rlobrecht This is almost certainly a lie. Unless it has a physical switch that closes when you plug in a USB plug, then it has to have some circuitry on to create regulated +5V even if it isn't used. Or even if it uses electrical detection of a USB device, that's still taking power to do it.
@rlobrecht
Some sockets are setup so that the act of inserting a plug makes a connection that switches on the socket. (usually by pushing a spring loaded contact to close the circuit)
@spin cycle not exactly. There have been smart ac/dc converters around for quite some time, which don't draw power until a load is applied.
@rlobrecht Unverified: you're wrong. You cannot do anything without electricity to do it. So unless it has a mechanical switch to turn it on when something is plugged in, it takes electricity even when "off". It may take very, very little. But very little is not the same as none.
@rlobrecht Forgive me if I seem ignorant, but wouldn't it only draw power if the circuit is completed by something plugged into the cable?