Rough idle after replacing battery

[Halothane]

x5 4.4 2005

Hey guys, I was dealing with a failing battery for months...and finally decided to replace the 50# beast.

Yesterday my alarm was going off intermittently at work despite attempts to disable the alarm with the key. I'm assuming it was a low voltage issue. Of course my battery was dead later.

Once I jumped it, I had a rough idle all the way to autozone. Purchased the comparable OEM replacment 760 cca battery: Duralast H8-DLG.

This morning, new battery. Same rough idle all the way to work (20 miles).

Think this issue will resolve by itself? I'm assuming its a generic computer issue....anyone have a differential diagnosis?