So I am in the beginning stages of considering the PIP. I am of the ilk who buy cars new and run them for 15 years. So the life of the PIP battery is a primary concern to me. Toyota says the PIP battery is 4.4 kWh Lithium-Ion (not sure the exact chemistry). Users say it takes 3 kWh per charge. That is 68% of full charge so it sounds like Toyota has programed the thing to run from 84% to 16% or something like that, which sounds pretty conservative. My commute is between 11 and 17 miles depending on route and stops. I am thinking with some basic hypermiling techniques I currently employ, I could get to work, charge, and get home all EVmost of the time. If the battery stays strong I will make my additional investment over the regular Prius back no problem. As the battery degrades with age that will cut into EV range, and make the vehicle a bit less compelling. Question: If I am cycling this battery 2x per day, living in the Boston area (not too hot or cold), how long is it reasonable to expect this battery to last? It needs to give 11,000 cycles over the 15 years of ownership. Assuming 12,000 miles per year, 2/3 in EVand 1/3 in HEV mode, that is about 180,000 miles total and 120,000 of that in pure EV. Will it follow the degradation that Nissan claims the for the Leaf: 80% after 5 years, 70% after 10 years . . . 12 years? 15 years? 8 miles of EV range after 10 years does not sound great . . . The problem I am struggling is that I want to move over the a plug-in vehicle but there is nothing wrong with my current vehicle and though I love the PIP, the 11-mile EV range is a little low. I don't like the Volt do to is poor gas FE and the Leaf does not give the extended range I need for road trips. Do I jump now and live with the current PIP for the next 15 years or wait a year or two when there will be more plug-in options available (like the 2015 PIP)?