Excerpt from an article on why electric (wireless) cars have no future:
So, then, we have green cars, right? Alas, no. The electric car has a serious environmental drawback compared to a car running on a combustion engine: the battery. The ‘fuel tank’ of an electric car consists of hundreds of connected batteries, each of them comparable to the battery of a mobile phone (the Tesla Roadster, an electric sports car, has more than 6,000 of them). After some years, they all have to be replaced, and already before that time there is a reduction in storage capacity.
The environmental profit gained by a higher efficiency (or by green electricity) will be negated completely by the massive amount of batteries required. Batteries have to be manufactured, and that process is very energy-intensive and environmentally harmful. Batteries also have to be discarded or recycled - both processes again require extra energy and inflict environmental harm.