Hello from the Heartland(Oklahoma)

Got my 2009 gt a couple weeks ago and had to let the wife have it as I had bought a new bike this last year without mentioning it before hand. You know how this goes. Anyway I am very impressed with the car every time I get to drive it. All stock and will probably stay that way. Great as it is. Just wondering, we are getting ready to take a long trip in this beast but I question how stout the battery is. Everytime I start her it seems to drag just slightly and then starts just fine. My question is do they normally turn a little slow initially or is this the sign the battery is going. Would hate to have to change her out in the middle of our trip.Thanks for any comments and I am glad to be a member here.