I don't know firsthand, but these guys say it's true: https://appleinsider.com/articles/20/10/27/magsafe-15w-fast-charging-restricted-to-apple-20w-adapter http

I don't know firsthand, but these guys say it's true: https://appleinsider.com/articles/20/10/27/magsafe-15w-fast-charging-restricted-to-apple-20w-adapter https://appleinsider.com/articles/20/10/27/magsafe-15w-fast-...