The past 2 weeks my Motorcraft BXT40 (the closes I can recall) battery has died while I left the car unused for a week. I didn't leave any lights or power accessories on. Both times there was completely no electricity left in the batteries and I needed a jump start. I had my mechanic check it and both alternator and battery measured fine on his meter. This weekend it started up fine but it hasn't been freezing cold as the past two. Only thing I notice was the indicator on the battery went from greenish to redish. Does anyone know what this indicator means?? My warranty just happened to expire 1 month ago.
