Sorry about the delay Robert but I was traveling & I apologize for my lengthy response. I had my new battery installed on 3/28/21 (the car had approx. 7000 miles at that stage), I was traveling in AZ and called AAA since the battery was dead when I started the car in the morning & jump starting didn't help. I had driven approx. 45 miles the previous day before stopping for the night. I called Subaru on my drive back to Ca and the person I spoke to kind of blew me off, said I should have had it towed to the dealer right away and there was nothing they could do now that AAA had installed a new battery. I explained i had no time to go to dealer etc. as I was traveling. As far as I'm aware, I have had no issues with the tailgate although I had found information about a Service Bulletin on this board in 2020 from another kind poster (Power Rear Gate (PRG) Control Module- Design Change) & supposedly my dealer did whatever he had to do when I took it in for my 6000 miles service.
When I had time 10 or so days later, i did email Subaru about my battery issue and here is their boilerplate sorry, can't help you & good luck in the future response.
"Thank you for contacting Subaru of America, Inc. We appreciate you taking time out of your day to contact us.
I am sorry to hear of the concern you have experienced with the battery in your Ascent. The factory provided battery on most 2019 Ascent’s is rated at about 530 Cold Cranking Amps (CCA). This is the force needed to turn over the battery and is the reserve the battery would draw upon to turn over the starter. There are circumstances that may call for a battery with higher cold cranking amps or a battery charger. The battery can lose its charge due to the electrical components of the vehicle drawing from the battery. It is also possible that if the vehicle is not used on a daily basis or sits for longer periods of time that the battery will not charge fully. This is because the engine computer, transmission computer, and computer models for the airbags, entertainment system and security systems are all using a small but continuous electrical current supply. Some customers find that replacing the battery with one that has more CCA, provides a better reserve for the electrical system. If the car sits for longer periods in a private garage, you may also want to consider a trickle-charger.
Your Subaru retailer is your best source for technical assistance. We rely on their technical training and expertise. They also have the advantage of being able to physically inspect and test your vehicle. If you have further concerns with the battery I would suggest having the vehicle towed to the nearest retailer to have them inspect it while it is down, do not charge the car or replace the battery. I hope this information is helpful.
Be assured, your concerns have been documented in our database and are available for historical review should it be necessary.
We appreciate you taking the time to share your experience with us.
Sincerely,
(Name withheld by me)
Subaru of America, Inc.
Customer Advocacy Department
1-800-SUBARU3 (1-800-782-2783)
Service Request Number: 1-67709180253