Installed 2 new batteries. Now issues.

I just put in two new batteries after I noticed the other ones were getting old and wanted to upgrade. Now before the new batteries I had no starting problems at all. I put the 2 new ones and now I am having starting issues. When I go to start it is like the batteries are dead in the first starting cycle. The second cycle it usually starts right up but sometimes it has to go to a third cycle. I'm confused on what this could be??? Any ideas??? Thanks