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Interesting reading about the battery degradation they are seeing with Lithium batteries. Looks like they are suffering the same thing many Leaf owner's have suffered from the AZ heat.
Its funny that they mention all the studies about EV usage but then don't really make use of any of that data (which says what they are saying: Keeping a Lithium battery at 100% for an extended period of time is bad for the battery). Most of the EV world doesn't truly charge the vehicles to 100% (In the Focus Electric case it goes from 10% at empty to 90% at fully charged even when the dash reads 100%. The Chevy Volt is even more conservative when it comes to the endpoints of the batteries charge.).
Wow and no cell balancing.. They really should have looked at all the EV research...
In my case: I always had the Focus Electric programmed to charge to full overnight so that it would reach full about 30 minutes prior to leaving for work. Thus it lived most of its day with the battery between 30% and 60% full. In the 3 years I had it I had never noticed any loss of range in the car (the day I turned it in at the end of the lease it still read over 100 miles of range available at full charge). Doing the same with my C-Max.
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