Reading this makes me wonder about the possibility of purely electric f1 vehicles, and what such a move might mean for electric cars in general.
There is also a plan in 2014 regulations that cars can only use electric engine when in pits. However, this can be delayed because teams are reluctant to it. Besides electric only engine is quiet so it could lead to some accidents in pit-lane.
The turbo engines will also have a motor/turbine on the turbo, allowing them to charge the battery from the turbo shaft. They will be able to use the battery power to directly drive the wheels, or spin up the turbo more quickly to the 100k rpm max speed of the turbo.