These cars have struggled a…
These cars have struggled a bit with ICCU problems. So have their cousins the Hyundai Ionic siblings.
There is a recall for this and AFAIK it solves the dead battery problem.
We have a Hyundai Kona and owners are sometimes surprised by dead 12V batteries b/c the factory battery only lasts about 3 years. Our four year old Kona is on it's second battery (1 year now) and we've had zero problems.
Buying a better battery - any 26R series FLA battery - seems to be the fix.