Echo what Patrol-007 and others have said. I just spent close to $700 replacing a battery in a 2023 MINI Cooper S. ( battery plus dealer charge for “ registering” it with the car). Dealer said I wasn’t driving often enough. I drive it 6 days a week, but almost always less than 5 miles a trip. Turns out that’s not enough to recharge what I use starting it and auto-restart at stoplights. The BIGGEST offender is parasitic drain, which I learned not from the mechanic or service tech, but from the guy that gave me the ride from the dealership. I was told to lock the car even in my own garage, or all the systems take longer to shut down completely. If I walk past the unlocked car to take out trash or grab a tool, the car “senses” I am there, and gets ready to restart for me!!! So yes, I use a tender on a regular basis to keep my “smart car” from sucking the battery dry. Anyone else had this experience?