Registering a new battery?

[jasondlyman]

Hey folks!
I am sure that this topic is located somewhere in these forums but I can't seem to locate it so I thought I would ask the question here. I've got a 2006 X5 3.0 and it has a dead battery. My question is, how crucial is it that I take it to my repair shop to have them install the new battery AND have it registered vs. going to Autozone, picking one up myself and installing it at home? Is my X5 going to explode if I don't take it in? Will the battery die in a month? Additionally I am only about 90% sure it's the battery so I want to replace it to test that theory. Any help would be appreciated, even if it is a link to a previous forum discussion on this topic. Thanks!