Posted by Karl on Feb 15, 2020; 12:00am
URL: https://www.es-forum.com/Turned-off-Laptop-still-emits-something-tp4035037p4035074.html

The USB port on my Thinkpad T61 will continue to charge devices during sleep mode, but only if a device is plugged in when the computer goes to sleep.  It won't charge anything when it's shut down.