We have a 2018 Jeep Wrangler JK willy edition. We drove it about 700 miles and the next morning the battery was dead. I got a jump from someone using one of those little portable packs. It started up and I pulled out of the parking space and within about 5 seconds all the dashboard lights started going off the lights in the interior started flickering and then the Jeep turned itself off. I tried jumping it again and letting it run for about 20 minutes to charge the batteries all the lights on the dashboard when off except for the check engine light the interior lights stopped flickering so I figured I was good I was going to go to AutoZone and get the check engine light cleared I pulled out of the space within about 3 seconds all the lights on the dash started coming on again and then I pulled into a space and turned it off myself this time. Any ideas? Bad battery or is my alternator dead? Jeep has 29000 miles. Thx!