LEV Battery is a battery that uses lithium metal or lithium alloy as the anode material and uses a non-aqueous electrolyte solution. The difference between LEV Battery and lithium ion battery is that the former is a primary battery and the latter is a rechargeable battery. The inventor of LEV Battery is lewis urry.

Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Therefore, LEV Battery has not been used for a long time. With the development of microelectronics technology at the end of the twentieth century, more and more miniaturized devices have put forward high demands on power supplies. LEV Battery then entered a large-scale practical stage.
It was first used in pacemakers. The self-discharge rate of LEV Battery is extremely low, and the discharge voltage is gentle. The pacemaker implanted in the human body can operate for a long time without recharging. LEV Battery generally has a standard voltage higher than 3.0 volts, which is more suitable for integrated circuit power supply. Lithium manganese dioxide batteries are widely used in computers, calculators, digital cameras, and watches.
In order to develop a more excellent type, people have conducted research on various materials. So as to create an unprecedented product. For example, lithium sulfur dioxide batteries and lithium thionyl chloride batteries are very characteristic. Their positive active material is also a solvent for the electrolyte. This structure only appears in non-aqueous electrochemical systems. Therefore, the research of LEV Battery has also promoted the development of electrochemical theory of non-aqueous systems. In addition to using various non-aqueous solvents, people have also conducted research on polymer thin film batteries.