Why has Hyundai removed the 48v battery from the Bayon?

Has the new Hyundai Bayon (2025) had the 48v battery removed due to problems with it?

Why has the economy in my MHEV dropped so much in cold weather?

My Kia Sportage MHEV seems to be doing 15% less mpg since the weather turned colder, with the battery power cutting in less regularly despite saying it’s well charged. Is this a fault with my car or something...