the PHEV battery has no declared warranty as to what % of original capacity it will hold. In the UK Mitsubishi declared for their Outlander PHEV "This includes a guarantee that if the traction battery capacity falls below 70% in the first 8 years/100,000 miles a free repair or replacement will be provided." Couldn't find any similar statement in Kia, and no sales rep could find an answer. Not a deal breaker for me, I have reasonable expectations of a few percent loss/year. I just came out of a 2013 PHEV Ford Cmax Energi, EV battery capacity dropped about 40% in 5 years, estimated EV range dropped from 25 to 15. Still works perfectly as hybrid, since that portion of the battery capacity (about 2 kWh of the total 7.2 kWh for the Ford) is always reserved. So the plug in component dropped from 5.5 kWh available for pure EV driving to 3.8 after 5 years. Heat is the enemy, either during charging or operation, and these air-cooled battery packs get plenty hot. Ford would only reply that lithium ion battery degradation is 'expected' and would not warranty any lower limit. 10 years/100,000 mile warranty is meaningless unless there is a total failure to hold even a hybrid charge. I was invited by a law firm to be the class representative to sue Ford to declare a warranty replacement level, but declined. Same law firm got the Leaf owners replacement batteries if it fell below 70% in 7 years.