The Saft LS17500 has concentric electrodes also called bobbin construction that enables maximum loading of active materials and corresponding energy. The Saft LS17500 cell is designed specifically for long-term, that is around 3 to 15 years of applications, featuring a few UA based currents and periodic pulses, typically in the 5 to 150 mA range. Lithium thionyl chloride has the highest energy density of any practical lithium battery chemistry, 3 times greater than alkaline batteries. It also has the widest operating temperature range of -55 degrees Celsius to +85 degrees Celsius. Self discharge is low at less than 1 percent per annum at 20 degrees Celsius, giving an effective shelf life of 10 years. This A size lithium thionyl chloride battery is commonly used in wireless alarm systems, memory backup for computers, high tech dive computers, MP3 players, bar-code scanners and night vision equipment. These batteries are non-flammable with excellent resistance to humid environments, low magnetic signature, good resistance to passivation and inorganic.