The experts have prepared the battery less mobile phone in America. Further experiments are continued on this smart phone. The experts of University of Washington have prepared the mobile phone, which needs very less electrical energy and some part of it will be provided from the rice sized solar cell, which is installed in front part and some energy will be provided from the nearest mobile phone tower. The experts say that the initial experiments on this phone remained successful and the work is being done on its preparation and use on the large scale.