The good news is that all functional USB-C cables will generally charge at 30W. They might not be able to go above 30W, they might only have USB 2.0 speeds. The

The good news is that all functional USB-C cables will generally charge at 30W. They might not be able to go above 30W, they might only have USB 2.0 speeds. The USB-IF has only just now come up with IMHO their first passable attempt at labelling. However, for a couch or car charger for a phone, just about any cable that is wired correctly should do everything you want. The problems come with alt modes and fast charging - the cable might not support the full capabilities, or the device itself (points idly at Nintendo Switch and Raspberry Pi 4) might not have shipped as USB-compliant, breaking with certain valid setups. My opinion, the problem here isn't just cabling but troubleshooting help - how do I know the cable or charger I'm using isn't charging my computer at full speed? And which one is the problem?