Got an IdeaPad S206, but only round Thinkpad chargers. How to charge?

I’m working on a used Lenovo IdeaPad S206, to possibly make it donation-worthy. Right now, my problem is: Can’t charge it! It uses a charger that’s different than ThinkPad chargers (both the round and the rectangular socket variants).

Now, sure, I could buy a brand new IdeaPad S206 charger, but I want to avoid doing that. Can I, instead…

  • Adapt the connector jack of an (older, round-jack) Thinkpad charger to use with the IdeaPad?
  • Adapt a mobile phone charger, e.g. via a USB-C cable, to go into the IdeaPad?