Chemical Reaction
All GE BATTERY cells are based on the same electrochemical system. The reactions during current flow are:
At the Anode:
4Li----4Li+ +4e-
At the Cathode :
2SOCl2--------SO2+S+4Cl--4e-
Overall:
4Li+2SOCl2----------4LiCl+S+SO2

Most of the SO2 formed during cell discharge is dissolved in the electrolyte and cathode. This accounts for the low internal cell pressure before, during and after nomal discharge.

GE BATTERY Lithium Thionyl Chloride(Li/SOCl2) Cells Feature:

Greater Energy Density --------Lithium Thionyl Chloride cells offer the highest energy density of any primary cell, up to 710Wh/kg.
Higher Capacity--------Li/SOCl2 cells feature the highest capacity by weight and volume compared to any known battery technology
Higher Operating Voltage-------Lithium Thionyl Chloride cells have an open circuit voltage of 3.67V and an operating voltage of up to 3.6V, a considerably high voltage than almost any other primary cell.
Extended Temperature Range------- GE Batteries can operate in temperature ranging from -55 degree C to + 150 degree C. However, to maximize the capacity,standard batteries are rated to a maximum temperature of +85 C
Long Life-------Batteries can operate 15 years to 20 years
Environmentally Friendly-----------our batteries are free of heavy metals

Bobbin Type vs Spiral Type
Two type of lithium thionyl chloride cells are available: bobbin and spiral wound construction. Bobbin type cells are particularly well suited for low self- dischargerate, and 10 to 20 years storage life. High capacity, small size, and an ability towithstand broad fluctuations in pressure, emperature and shock make bobbin type cells ideal for use in remote monitoring applications. However,a growing number of applications require high current pulses. Spiral type cells are ideal for high pulse current applications. In addition, there are small impedance for spiral type. ( "M" stands for spiral type in our part number)