In order for electric cars to be successful their driving range must be increased and their sticker prices have to come down.
Full electric cars that have no gasoline engine backup to kick-in once the battery power has been depleted have a major drawback that is straining sales; driving range.
Of the handful of pure electric cars most have a range of under 150 kms. Which is fine for those who only use their cars for grocery getting. However for the times when even those people need to travel further a pure electric car is not practical.
Currently the Nissan Leaf has a range of 120 kms, the electric Honda Fit has a range of 135 kms, the electric Ford Focus has a range of 120 kms, the Mitsubishi MiEV has a range of 100 kms.
Automakers are having a difficult time figuring a way to lower battery costs while at the same time increasing their power and reducing their weight.
Until these electric vehicles figure a way to double their range on a single charge they will be limited to niche vehicles at best. For only those who drive a very limited range and have easy access to home or public charging areas.