New Aerospace EVO owner

[jpgreenwood]

After deciding on what model to buy (I was going to buy an RAF special edition model), a steal of a watch came up.
Standard 2016 EVO, blue face, full box and papers, mint in every way. So, it is now in my possession.
I've read the manual and watched a couple of YouTube tutorials. I'm happy about how everything works, but I do find the "fast rotate" part of the crown a bit of a pain to get right, and it takes a couple of go's to get the display to move across the various modes.
Its also very difficult to read, not very bright.
Lastly, one of the tutorials states that it has a backlight function, that will illuminate the displays if the crown is rotated slowly. I cannot get this to function.
I'm wondering if the battery is in need of replacement?
Can any Aerospace experts shed any light on this (sorry, pun intended!)