There are regulations on how much li ion battey a machine may have to be allowed in the cabin pn a plane. I think many companies won't cross that limit. So something like the removable / modular batteries from the past might be great
Up to 100 Wh / battery, up to 160 Wh with airline approval. All laptops I know of have a 100 Wh battery at most. Macbook pro's used to have that size, but the latest gen has a smaller capacity. You can carry spare batteries, as long as they are for "personal use".