Haha yup. When replacing BMW batteries, they need to be programmed or idiot lights come on. Luckily, you can use a programmer at home these days.
The AG battery has a safety cutoff so if it does go past a certain voltage, it shuts off until you press the restart button. In theory, it shouldn’t leave you stranded If the battery is healthy and so is your charging system. I mean, I have AAA for a reason if a vehicle does dies on me too. In a pinch, you could replace the AG with a regular battery if it truly is dead and you need the vehicle right away.
Let me say that this battery isn’t for everyone because it is expensive and isn’t stocked at the local Autozone if you wanted to just pick a new one up. But it is an option for those who want a lighter alternative and don’t regularly drive the vehicle or have a charger on them. I just recently had to use the restart button on my E46 M3 as I didn’t drive or charge it all winter and wanted to go drive a manual over the weekend. Your mileage may vary.