It is an alkali metal and the lightest of all solid elements and is highly reactive.
It is used in pharmacology as any of various preparations of lithium salts; such as, lithium carbonate, used in treating certain psychological conditions.
Lithium is also used to make alloys, batteries, glass for large telescopes, and ceramics.
It has greater capacity and efficiency than the earlier nickel cadmium version and is now widely used for applications; such as, laptop computers, cell phones, video cameras, and other mobile communication devices.
Such batteries have very high energy storage density.
This offers certain advantages in terms of size, design, and power.
It can store large amounts of energy per unit weight and is an emerging technology for such applications as laptop computers and electric powered/hybrid vehicles.