Quite an interesting concept. It would require a high degree of standardization. Questions I have are; 1. how far can you go on a single charge? 2. What if your battery is only partially charged. Do you pay for a full charge? 3. Is this a stand alone technology, or can it be done as a hybrid? Charging stations would have to be spaced close enough to ensure not running out of juice. Some sort of trickle charger would be desirable for overnight charging.

We are replacing one pollution by another. What about the pollution due to aged batteries? Cadmium and others to our earth or water?

Well, we can control aged batteries with the introduction of law and incentive but we can not control smoke so it is a step forward. Do you think?

GA. The autonomy of a car is already reasonably solved by the current technology with hybrid applications. The problem is still recycling, manufacturing, disposal of an enormous number of batteries using metals that are not easily disposable.

This problem is yet to be solved by developing less aggressive batteries compounds, regenerative fuel cells, and - if not a complete solution - batteries that have a real bigger autonomy, allowing the use of less units for a longer time. Add environment impact in the batteries manufacture chain...

This is as much a problem - or even worst - than smoke.