We have a 2020 eco diesel rubicon. Battery was deader than a door nail about 10 months after purchase. This happened the morning we were going to head out on a trip. To make matters worse , we had to have the jeep towed to the dealer from our garage because you couldn’t jump it. No warning at all. Dealer said they had to replaced both batteries. On a side note, I had recently noticed that the voltage readout dropped as low as 11.5 volts. We have been getting intermittent sensor check engine codes. Convinced the dealer to check the alternator and battery sensors to see if low voltage may cause temporary sensor errors. He is going to replace both the alternator and battery sensors to see if this fixes all these intermittent cel. Will follow up with results once the parts finally come in.