Batteries are a key technology of the 21st century and even of the 20th century. The success of mobile communication devices, as cellular phones, tablet computers, digital still cameras, and laptop computers was strongly supported by the improvements of the energy storage technologies. In the 1980s only lead acid and nickel cadmium batteries were used in mobile applications. The development of more advanced technologies as nickel-metal hydride and Li-ion and there introduction into the market in 1990 and 1991 pushed the development of mobile devices. About 10 years later, the development of high power li-ion batteries pushed the development of cordless power tools and other new applications that were not possible with older battery technolo...