ABB and partners to evaluate the reuse of the Nissan LEAF battery for commercial purposes - ABB, the leading power and automation technology group, 4R Energy, Nissan North America, Inc. (NNA) and Sumitomo Corporation of America have formed a partnership to evaluate the reuse of lithium-ion battery packs that power the Nissan LEAF, the world's first and only all-electric car designed for the mass market.

The article did not mention whether there is US DoE funding involved.  If they want to risk their corporate capital then that is their privilege.

The life listed was 10 years.  The average miles per year driven in the US according to the DoT is about 13,500.  If the average speed is about 52.5 mph--a wild guess using the average of 35 and 70 mph speeds--that is about 2570 hours during which the battery pack is being discharged.  Charging a Leaf with 220 volts is a roughly 8 hour exercise for a battery pack discharged to about 80% or so whereas it can put out energy for roughly 80 miles at the 52.5 mph average or bout 1.52 hours per 8 hour charge.  I believe actually though the charge time is limited by the amperage the circuit can handle rather than the battery pack's ability to absorb energy.

Anyway, my question is, if the battery pack deteriorates to 70% capability over 2570 hours, how fast will it deteriorate in service for 8760 hours per year?