A family friend's 2008 X5 3.0si needs a new battery. They got a new battery from a local AutoZone store and I am helping with the replacement. Tomaz' youtube clip is helpful. I have been reading on this Forum some posts saying if the battery is not "registered" it could cause damage to components. I am wondering if this battery "register" is for DIY and, if so, how it is done.

Please advise. Thank you.