I need to get on top of this. I need a power lead for my new laptop No 5, which I plan to travel with.
Standards and Shapes
See https://www.worldstandards.eu/electricity/plugs-and-sockets/
Also https://wise.com/gb/plug-types/switzerland
USB Converters
My HP laptop needs needs a 65w feed, and I want an EU compatible plug. I used this search to find some products.
See also My solar charged power bank & On USB C, both on this wiki