NHTSA Complaint #11417880 — 2020 TOYOTA RAV4

I purchased this vehicle in 2020 and from then this has happened twice and no information was provided when I serviced my vehicle or when the vehicle was repaired last time. The battery died earlier with a warning but this time, the battery died again without a warning. The battery was changed in August within 7 months of purchasing the vehicle and after that in the next 8-9 months, the battery died. I am scared to use this vehicle anymore because you never know when the battery will die and the service center people have no information about why the battery got drained out. I saw few more similar complaints online. The vehicle was idle or not used only for 3 days.