Just purchased a preowned 2005 X5 3.0. Don't know when the battery was last changed, and I don't intend to get stuck this winter. Standard business radio model, but I do charge a lot of my gadgets from the lighter sockets. Would the yellow top be a better choice than the red?

Is the battery a straight forward swap? Will any alarms, computers, etc get damaged or triggered if I do it myself? Or is there something that needs to be done during a battery swap?