Lithium Thionyl Chloride Battery have a lightest metallic lithium anode and a liquid cathode comprising a porous carbon current collector filled with thionyl chloride (SOCl₂). They deliver a voltage of 3.6 V and with cylindrical, prismatic and wafer in shape, with spiral electrodes for power applications and for prolonged discharge. Lithium-thionyl chloride cells have a high energy density, partly because of their high nominal voltage of 3.6 V. It is three times greater than Alkaline batteries. It also has the widest operating temperature range of -55C to + 150^oC. Because self-discharge is extremely low (less than 1% per year), this kind of cell can support long storage periods and achieve a service life of 10 to 20 years. 

For different applications, the cells can be fitted with various types of connectors and assembled in various battery arrays, including a number of standardized versions. Application are mainly wireless alarm systems, memory backup for computers, high tech dive computers, MP3 players, bar-code scanners and night vision equipment.