Both of the methods work for about 10 seconds because of two reasons; either all of the storage systems are used up or because the sanctioning body limits the vehicle to a fixed amount of boost per lap. The system then changes the energy and pushes it to a pair batteries that are bolted to the cars carbon fiber frame. The first battery feeds the propulsion system and the other diverts power to the cars accessories, i.e. windshield wipers, A/C, audio system, etc.