On three occasions the battery in my 2019 qx80 has died for no apparent reason. the car is a 2019 and the battery died 8 months, 10 months and now 13 months after purchasing it brand new. each time the car has driven fine in the morning on my way to work but when i tried to turn it on to head home it didn't start. i was initially told it was a bad battery and then told it was an alternator issue. i have two young children and am now scared to drive them in our family vehicle out of fear of being stranded again.