600EX-RT speedlite won't read batteries

[cfontenot]

I'm on my 2nd brand new out of the box speedlite.  I have tried several different brand AA batteries & I am getting the no battery icon on my screen.  So freaking frustrated.  Any advice on what to do?

[Vanie24_2]

Hey! How do I turn on this battery display?

[p4pictures]

That is not a Canon Speedlite 600EX-RT or 600EX II-RT, they don't have a battery icon on the LCD at all. I think it may be a Speedlite from one of the independent brands like Yongnuo. 

The reason I suspect this is not a Canon unit is that it has the MODE label for the button in white text next to the buttons, but a Canon Speedlite has the button itself with black MODE text on.

[Nick55]

Now if we can finally identify and resolve the dreaded issue of “Link Drop”…..