Parked my 2012 in the garage for 5 months, treated the gas but FORGOT to unhook the battery! It was dead, really dead, hooked the charger up but it doesnt seem to be coming back. This is the factory ORIGINAL battery (2012 model) so I am guessing its finally gone bad. Are there ANY OTHER things I should be checking before I replace the battery? Should I put in say a Walmart Battery (Johnson controls) or maybe one from the FORD dealer? I'm sure it will be more expensive, just wondering if the FORD battery will last that much longer than the Advanced/Autozone/Walmart types- enough to make paying more for it worth the expense?