It is an inconspicuous, yet absolutely essential origin of energy in everyday life. Without batteries and batteries, the car will not move, the mobile telephone will not work, no modern device is operating today. Without photovoltaic farms and energy retention batteries, there may shortly not be unchangeable power supply. This year, for the first time in history, more than half of the recently installed electricity generation capacity comes from solar power, and its meaning and future are inextricably linked to the improvement of battery technologies.