battery suggestions?

I just got them at the Ford dealer and pad the $$. I did not know that O'Reilly has them. Good to know that that Dodge Cummins' use them too..... the ones in the Dodge CTD are the originals and are 9 years old. They started getting a tad weaker last winter if it sat for a week in the cold. I'll need to replace them this coming winter most likely so it is good to know another source. Thanks!