Ten days sitting in the garage and the battery was dead.
We didn't use our 26 Tucson for 10 days and when we went out to drive it, the battery was dead. We finally got the battery charged using jumper cables enough to start it, but it took almost 2 hours using our 2018 Hyundai. My wife got on the internet on a Hyundai chat group and found this is happening all over the country because the new Hyundai's have so many electronic systems that are ON all the time that they drain the battery if not used for at least 30 minutes of driving every week. This is totally unacceptable! We travel a lot and the dealership said the solution is to leave a trickle charger on the Tucson if we're going to be away for a while. That means we can no longer leave our car at the airport if we're going to be gone for at least 10 days as we know it will be dead. We can leave our 2018 as it can be left a month and it will still start. We have disconnected some features to try to get by without a dead battery, but Hyundai has tried to add features without providing either a large enough battery or other mechanism to protect against being stranded. The Hybrid has a second battery that can be used to start the car, but the gas model does not have this feature. I would never have bought this car if I had known in advance how bad this engineering is. The safety features are good, but useless if the car cannot be driven and can not be depended on to be available.