Certainly, the company needs now and urgently a stable smartphone for customers to feel comfortable with. For the instant, Samsung hasn’t responded to a Fortune request for comment on the Galaxy S7 Edge in question. The big problem in all cases is the battery. Since their use by Sony in 1991, these batteries have come to dominate every aspect of energy of the 21st century. Li-ion batteries have become the power source of phones, various devices and even space rockets and electric cars. Aluminium-graphite cells, sodium-ion batteries or foam cells are all promising alternatives and the future will decide.