shinydashboard some Font Awesome Icons Not Working

Question

When using shinydashboard I find that some icons seem to work while some don\'t. In the below example, the battery-full icon doesn\'t work while the clock-o ico

Answer 1

For me, in oct/2020, solution was adding a "s" after first "fa", as in fa fa-caret-up to fas fa-caret-up since it's the new sintax for font awesome icons.