I own 3 Kia’s and they all have various problems, including really big problems, but this is an area they got right. On my daily driver, the Kia Niro, it has a battery button that instantly charges the 12v from the HEV battery. I’ve only needed it once, when I left a light on camping, but it was like magic.
Edit: A friend of mine just got a free engine swap for her... 2012-ish Optima. It threw a CEL on the highway, had the appropriate trouble code, and bam, new engine from the dealership when she told them the code.
I own 3 Kia’s and they all have various problems, including really big problems, but this is an area they got right. On my daily driver, the Kia Niro, it has a battery button that instantly charges the 12v from the HEV battery. I’ve only needed it once, when I left a light on camping, but it was like magic.