The “best” would be some kind of DC to DC converter, but I’m not sure there’s anything plug and play atm because there’s a wide range of specs laptops want. If your laptop happens to change with USB c PD or whatever the spec is that’d be the most efficient that I’m aware of. No sense in going dc->ac->dc if it can be helped.

Remember when the SS lost all of their communication records from Jan 6th?

Europe please be ready. My tea leaves are pointing towards the use of nuclear weapons in Europe while the us is distracted with civil unrest.