battery on 1994 Jaguar XJ12

if battery is cracked by post is it still safe to use?

Asked by for the 1994 Jaguar XJ12
Change it asap. Vented gasses at that point are highly explosive and corrosion from the acid will start to attack near components.
1 more answer
Make sure battery is properly secured and the hold down bracket is in place. Perhaps that is the reason the battery casing cracked.