Using USB-C cables and chargers with older style connectors is something I've actually been curious about for a little while and in this video from Laptop Retrospective, such cables are covered. Now on the two computers shown in the video, it's seen that this is possible. However, I'm wanting to see how well it works with some more demanding systems, such as the Dell G15. So I have a USB-C to 7.4mm Dell barrel cable that should be arriving tomorrow. While the Dell G15 comes with a 170W power brick, it does seem to get along well enough with a lower wattage adapter. I'll be trying the cable with an 87W Platinum-branded USB-C power adapter, which saw regular use with my 16-inch MacBook Pro. Hopefully the results are good.