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a car that runs on a battery that never needs to get charged

A dynamo produces electricity when it is turned and batteries gives energy to motors to turn a wheel.while the wheel is turning we can use this energy to turn the dynamo and produce electricity that charges the battery at the same time the car is moving.Of course we will need a huge battery but by nano technology we can minimize the size by using nano-batteries.

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  • Jul 17 2013: I think it is not possible. In terms of energy balance, the car would have rub with ground, thus it consumes energy.
    Besides, what you thought is ideal condition, because no efficiency is 100%, i.e. dynamo cannot convert mechanical energy into electrical energy with 100% efficiency.
    • Jul 17 2013: Maybe Using more that one dynamo can balance it

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