I bought an O'Reilly 84 month battery for our 01 Escape in 2011. Third car, now with 225k but driven daily. It went dead in January of 2014 so I got a new one free. This morning it was dead. O'Reilly condemned it but the prorate was $96 since the 2011 prcchase date was used. The Motorcraft batteries in my Mustang have been great, as well as the Acadia batteries. The car does get a lot of short trips. Would an occasional charge improve battery life?