The Motocraft Battery in my 2014 E450 Super Duty has an 'eye'
The only other battery I ever had that had an 'eye' was an AC Delco and if it was good to go it was green.
I am a 'bad owner' and never paid attention to the vehicle battery only the 6 volt coach batteries which I religiously check the water levels in and add distilled water as is necessary.
Today I went to get my unit and the battery was dead and the eye appears red. I have not used it since our return from the desert south west in mid March and when I have been exercising my generator I never started the E450 (my bad).
That color should the 'eye' be in a charged state and will the battery recover after some long daylight driving or is it 'kaput'