yeah but it seems that it would beet what we have now, which is limited range assuming there is no added sound systems and so on. The battery's charge would be able to hold the car not moving for quite some time I would think.. I can sit and listen to the radio for over an hour in my car and it still cranks fine, surely with some high tech batteries and several of them, that wouldnt be much of an issue.. I Wouldnt think anyways