Battery for 2007 Ranger

Hello, I have a 2007 Ranger XLT Limited (143 hp, 2.5l, diesel) and no idea what kind of battery is in it. Somehow I can’t see the label (not without expanding it) and I found nothing in the manual. Well… and since it’s been ticking around after 2-3 days of service, it’s probably time to exchange it before the winter! Can someone tell me how much Ah should have the good piece! Thank you & Greeting Peter