Why are you replacing a new battery? If your asking how to replace your old worn out battery with a new one, are you asking about the car battery or the battery in the key fob?
I've got a '10 XKR and the battery is in the trunk...pretty simple to replace it. I had the dealer to it, but if I ever needed to get another one I would just let any battery place do it This model has a constant drain on the battery due to the alarm system, etc., so I hook mine up to a trickle charge daily...if you let the car sit for a week or so the battery will drain down without trickle charging it...bought the trickle charge at Advance Auto for around $50. Jim in Augusta, GA
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