The battery must be fully charged, remove the cables and use a real battery charger not a trickle , once the battery is FULLY CHARGED place cables back on. Proceed with BATTERY DISCHARGE PROCEDURES ,listed in your manual or as the dealer should do,PLUG IN THE OBII READER AND CLEAR ALL CODES!!!!!!!!!!!!!. Failure to clear all default codes, which will pop up automatically cause it read your dead draining battery will lead to ENGINE LITE,CHECK ENGINE LITE,ONE BRAKE LIGHT, ECT. IT IS A SHED DOWN SYSTEM. Please just clear all codes before you start the car or you will have to CLEAR CODES, DRIVE TO CLEAR CODES and get aggrevated at the same time.Many of us have gone down this road. ENJOY , GOOD LUCK GTJOEY 1314 :thumbsup