From an electric vehicle standpoint, there's no question that the evolution of the battery systems has now enabled us to sell commercially viable vehicles like the Chevrolet Volt. The energy density of batteries has been a limiting factor—how much energy you can put into a certain mass of battery or size. That has been improving and we expect that to continue.
The other relevant factor to the broader commercialization of that technology is the need for the cost to come down as well. The interesting aspect about battery electric vehicles and having the battery onboard is that there's a commercial value to the battery after it's no longer feasible to use in a vehicle. Once a battery gets about 70% charge-holding capacity, it's no longer viable for a vehicle but has much commercial value in things like remote storage, backup power, peak shaving, etc.
We're doing a number of projects with ABB Automation, to look at how to use these batteries in a secondary life—to support levelling charge loads in the infrastructure in the grid and other applications—to help fully utilize that battery and reduce the cost that applies to the vehicle. In fact, we're researching that in our engineering centre in Oshawa.