I have been looking at the economics of EV ownership. I've narrowed it down to the Bolt or the Volt. My typical drive is about 50-60 miles a day. At that rate, a 100,000/8 year warranty expires in 5 1/2 years if I purchase new. The thing I can't get a good answer on is the out of warranty replacement of batteries. That has to be figured into the cost of ownership. Does anyone know?