I have a bunch of old thinkpads and need to keep around 3 different chargers (round, rectangular and usb-c). Could be great to go all in USB-C at some point.
Lenovo chargers are 20V. USB-C PD supports that and there are "Type C to Lenovo" cables with integrated circuit to negotiate the voltage. You need to have the correct wattage of the USB-C charger though.
I have a bunch of old thinkpads and need to keep around 3 different chargers (round, rectangular and usb-c). Could be great to go all in USB-C at some point.