Is the battery stuffed????????

A battery at 11V has at least one duff cell, maybe two. Definitely in need of replacement prefereably with a chunky one. For example an 063 battery won't last very long, you need the battery from the likes of an old Jag 4.2. a href="http://www.griffinbatterycentres.co.uk/jaguar-car-battery.html" rel="nofollow"http://www.griffinbatterycentres.co.uk/j…/a