Kia's just suck in general AFAIK. My friend has a 2010 Kia Sorento and he has some "device" on top of the positive (?) terminal of his battery. The terminal ring is a bit loose so it doesn't make proper contact with the battery terminal and he has to hold it against it so that he can start his car.
I thought he was bullshitting me at first because he's not a car guy and told me before that when his car was fucking up that it was the transmission, but it was the coil packs. Nope, there's a big black box on the top of the battery and he said that only Kia can service it, and it'll cost like $800 to fix.