so the origonal motorcraft battery, that came with the ranger, had the red indicator showing the battery was bad. but it still started the truck every time, though on some cold starts it took a second or two too start up.
got a new duralast gold 58-dlg (perfect fit). i wanted an optima but i didnt want to modify the battery tray and saved 100 bucks.
now it starts up right away and i have more confidence that i wont get stranded in the east side of buffalo.