htaccess UTF-8 encoding for .html, .css, .js - Whats the best way?

Question

For yslow page speed I want to remove my meta tag and put my encoding into the .htaccess file. Below are all the ways to do it I have read about. Which is the preferred way?

Answer 1

I think

AddDefaultCharset utf-8

is enough for all.

Maybe better way is set encoding to files, which are using different charset than default.