PHEV kWh comparisons

Here's the main battery kWh comparisons of the plug-in hybrids in the US. Keep in mind that these numbers may refer to full capacity, not necessarily the usable capacity. Please correct me if I am in err:

2013 Chevy Volt = 16kWh
2013 Ford Fusion Energi = 7.6kWh
2013 Ford C-Max Energi = 7.6kWh
2014 Honda Accord PHEV = 6.7kWh
2013 Toyota Plug-in Prius = 4.4kWh


Upcoming models (specs may change):

2014 Mitsubishi Outlander PHEV = 12kWh
2014 Audi A3 PHEV = 8.8kWh
2014 BMW i8 PHEV = 7.2kWh

Don't forget the Cadillac ELR, set to go on sale early 2014, has a capacity of 15.6kWh

Good point... Is that total kWh, or usable?

According to this site http://www.myelr.com/cadillac-elr-specs it's actually 16.5 kWh, so perhaps the 15.6 kWh is the usable capacity? Now I'm not so sure what to think...

Maybe not in US, but

Volvo V60 D6 = 11.2 kWh