What I have constantly said is that there has to be an energy source. I have also said they have not disclosed what the energy source is. I even said there is a possible energy source using nuclear waste, which actually IS a possible energy source that could keep a battery charged for hundreds or thousands of years. Again, all I have said is that there has to be a separate energy source to charge the batteries, because you can't put back what has already been used to move a car.
News 
Market Data 
Discover 
