I don't think anyone is mounting the battery outside of the car like a gas tank except Tesla. All of the PHEV and EVs I've seen have batteries reside inside of the vehicle. You'll have to do some serious damage to the car itself before the battery is damaged.placing the batteries below the floor has the positive of lowering the centre of gravity, but the batteries are more easily damaged, I believe tesla had to strengthen the floor in early models to prevent damage to the batteries
So, the cargo space in the kia is the same? Can you compare the cargo space? I was hoping it was bigger. The Niro is 54.5 cubic ft. with the seats down. I can't find the Ioniq's dimensions online but i loved driving it today.The folded seats do not fold all the way down flat in either version of the car, but the floor behind the seats are set slightly lower in the hybrid than in the EV.
I was able to transport a Miele tumble-dryer last week, in the original factory packaging. I've also had a bike in there, so the trunk is quite spacious.
Once I also loaded it full of boxes of paper, approx. one pallet in all, and probably exceeded every weight limit there is. The car didn't handle well, but I was able to wobble home a few kms. at low speeds.
The rear seat however, is not fit for three adults to sit comfortably. I.e., it is possible to squeeze in, but definitely gets tight sideways. Also, the height leaves something to be desired. I am 187 cm tall and my head bumps firmly into the ceiling.
My daughter bought the Kia Niro this week, and the rear seat there definitely has more headroom. Otherwise, the cars seem very, very similar.