Do not assume that a USB-C port means that a laptop will be charged via it. Some ports are only there for data transfer. The weakest link in your charging system may be the cable. These laptops can be charged via USB Power Delivery, which is becoming more common. However, very few USB-C cables are able to match the power requirements. While Power Delivery was limited to 100W at one time, most compatible cables could handle 65W and 100W respectively, today, it can deliver up to 240W. It can be difficult to check cable specifications on product pages. However, this rating should make things easier.