Doesn't anybody read what Lyle posts in his blog? Info straight from GM? They have told us more than once that they are designing the battery pack so that it will supply power enough to go 40 miles EV range for 10 years! This means that the brand new Volt battery will no doubt do better than 40 miles. They have always said this. In fact, now they are saying that they want to provide a ten year 150,000 mile warranty on the battery pack. Where you guys got the five year replacement schedule is beyond me. It wasn't from any GM press release. This car is having a tough enough time making it to market without us starting mis information about it. Here read up: http://gm-volt.com/2008/08/05/gm-says-chevy-volt-battery-will-have-a-10-year-150000-mile-warranty/