Off-grid mobile phone charging: An experimental study
Global demand for electricity and mobile phone (MP) service is increasing rapidly as a result of emerging markets in developing countries. Compared to the growth of mobile networks, the relatively high cost and technical limitations of extending electricity grids have left over 500 million MP users without access to electricity. MP charging has become one of the major end-use demands in rural electrification projects, where MP users spend disproportionate amounts of time and money seeking charging services.