1993 4.9L Seville - X920BT Navigation w/ backup cam, Flowmaster 40 Series Exhaust
For the past few months my Seville's battery has been draining if left to sit for more than a day. Today (after jump starting it and driving for 30min) it was dead after sitting for only 5min while pumping gas. The AAA technician's battery equipment indicated that the battery's cell is in poor condition and that the battery should be replaced - I bought the battery new in June 2019, barely 6 months ago. Is there any other problem that could cause a poor battery health result without it actually being the battery, or did I simply get a poor quality battery that I should return and replace?