Returned from a 7 day train trip to find my 2-month old car with a dead battery. Nothing was plugged in and/or lights left on. Called Hyundai roadside assistance who jump started it and then I drove it around for an hour to build up the charge. I am perplexed as to why this has happened to a new battery. I may go to Hyundai service to test the battery and/or wait to see if it happens again. Thanks for your feedback.