Your Jaguar has more than a dozen onboard computers monitoring and optimizing things like fuel consumption, navigation, your climate control, and a wide-array of safety systems. Needless to say, your car's electrical system is critical to the functioning of these systems, and your battery is a critical component of the electrical system itself.
It can be easy to overlook just how important your battery is, so being alert for warning signs of a weakening battery can help insure your Jaguar's systems are running properly and prevent you from encountering a break-down.